First i must say, that english is not my mother-language, i worked some time for the english army and studied sometime in hungary/Budapest, i am an estonian citizen also, and speak a little russian too. So i hope that i understood your questions well.
I am 50 years old now, quite an old man now😀.

Second you should know that i am i a MD (we call it "Dr.med." in germany) and i am teaching students for some years know, but i am self employed with my nurses who works in my team/place in germany.

Third you should know that i am a so called "Hive-whale", thats due to my history on this blockchain (i started with steem Dez 2017) and due to that  I did some investments form time to time (cost-average-effect), because i saw the great possibilities of this chain. 
I always said, that my "self-defintion" is a curator mainly for the german-speaking community on hive, because there are a lot for the english  speaking people. 
I was blogging by myself a little bit more once (about many topics, but not about medical-stuff, thats my profession, hive is my free time), now just once a month, you can check my account, and i have only this one.

Fourth i am supporting a lot of projects and accounts and meet-ups, you can check it out with @nbs.gmbh guys maybe.

I am not sure, wether i got the meaning of your questions, but i try an "short"😀 answer to that, what i think you asked.

"Does the fact that me and a lot of other people reach your posts and read them do not confirm the idea of decentralization?"
Yes, thats confirms the ideas of decentralization and also of the great opportunity to get rewards due to your posts/content, not Mark Zuckerberg should be the profiteur of your content, its you and your upvoter. Thats still an great idea for me.


"Don't you think it is natural that there will be individuals in the community that will have more power simply because they are competent individuals who have earned their power and reputation?"
Yes, i think thats "natural", due to our human beeing.
But if you still keep powering up constantly -i called it "Culot-Prinzip" https://peakd.com/deutsch/@balte/das-culot-prinzip 
or your are investing some fiat-money here, your power is rising (even more as the intern hive-inflation and surly more as the real inflation in the fiat-money-system, if you see consum-prices and asset-inflation (stocks, gold, land, houses). 
Thats okay for me in my point of view of the eoconomic things here, because you have to take the risk of lower valuation in shitty fiat money if you are powering up or investing.
 
But if you are a good blogger or dev or game-maker or something like that, you can get power nearly from zero, great, isnt it?

Then you have no real censorship here, even if i downvote the jelly-man as i do right now-due to a lot of reasons (i do not use my downvote power very often)-, and which he could easily stop by ending his personal crusade and insultings against german accounts: you still can read his posts and comments, they are hammered in the blockchain.

Then we had recently real meetups in Vienna, at the "Bodensee", and other places, we have a lot of virtual meet-ups very often, there are things like building a company and giving some jobs on the rise, we have a press in the german speaking so called "community" (really quite different persons and opinions), the @hiq, the people are gaming together, have some fun on chain or in discord, make content about a lot of things, discussions, sometimes they fight, thats also part of our human beeing.
At the end you have some "social control" and usually the discussions are polite.
On the hive Chain there are just 0,3% of the votes downvotes, great.
Thats why i am here.
Hope that you could read my bad english, not my mother language as i told, but i dont need the google-translator to much, maybe some words and sentences are strange, some are typical german "english-mistakes", well i did my very best😀 best regards.
https://www.youtube.com/watch?v=szMisIXJzYc

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I do not see how (1) relates to centralization. I have not tweeted in years but if I did right now, the Tweet would reach more people than a Hive post atm.

I think (2) is true and desirable.

As for the unnumbered part, people are getting votes for literally everything. Everything in the world has potential buyers.

When someone speaks about no decentralisation, they are usually voicing their letdown from too many people sharing a common view (opposite to their own) rather than conspiring.