Q: Why don't we give destroyed funds to charity or miners?
A: It gives them a bad incentive to make fake accounts, get into fake deals with real people, and destroy risk funds. If destroyed risk funds are not really destroyed and given to anyone, then whoever gets that has bad incentive to do bad things to get more of it.
I have concern about btc removed "forever" [0] and btc-rich folk draining the funds of poorer folks. Like how megacorps with huge legal budgets can bankrupt the average joe if they attempt court combat. An entity with a massive mining % && btc-income could stockpile for the sake of draining funds in bad trades.
[0] as long as the crypto algorithms remain secure