Let me be clear, I'm not blindly against voting bots or businesses generally, they are great (assuming they act responsibly and in a way that adds value to Steem rather than farming it from Steem, which I think is _possible_ for voting bots, but hardly a given). 

But for all the positives that business can do, bear in mind that any Steem transferred to them has a good chance of being sold. Not all will, some want to accumulate more stake, but ultimately many businesses in the crypto space want to earn fiat profits, or distribute profits to other cryptos. (And I don't think that's bad either, it's just a reality).

Now consider the @null account. It is the ultimate HODLer. Any Steem sent there will NOT be sold. Ever.

Burning is not the solution to every problem certainly but it is very powerful and when used appropriately can be a huge positive.