You don’t know that the company will perform worse because of the owners having to pay their taxes.

Price shocks in anything are generally bad for the economy (maybe with the exception of some commodities like oil, but even this can be bad since the producers of that commodity will be in trouble). You're too focused on the rich people, and not enough on the economy.

Price shocks are bad because they can cascade and cause businesses to fail, resulting in layoffs, etc.,. Stability is one of the most important things in the economy.