>For one thing, it's still not easy to send money via Bitcoin.

The problem here is that you're still thinking of crypto as gunpowder before guns existed.
What I am saying here is that guns haven't been invented yet. 
So all your arguments being laid out here revolve around gunpowder being used for fireworks and magic tricks.
Crypto is going to be weaponized; one of the most powerful economic weapons of all time.

We already see them trying to do this with CBDC, but that's not going to work because all the power comes from decentralized consensus.  Any community that doesn't adopt it will get bulldozed by it, and that might not even be a bad thing, especially in the long term. We simply aren't there yet all we see are the magic tricks.  Most importantly: we cannot predict how this is going to unfold. 

>Just typing in the long addresses and keys is a nightmare. And if you get them wrong, you're fucked.

#### You might be interested to know about the checksum.
In many cases if you type an address by hand or shuffle around the pubkey it's going to fail to send as it creates an invalid checksum.  

* A 12 word seed has 4 bits of checksum (1/16 chance of random success).
* 24 word seeds have 8 bits (1/256 chance of random success).
* While Base58 public addresses use 32 bits (1/4,294,967,296)

So it's basically impossible to shuffle around the numbers and send money to the wrong place. 
You've got a better chance at winning the lottery.
The real issue is scanning a malicious QR code or having a bad address injected on copy/paste.