You can buy a part of company. If you buy 0.00001% of that company, you surely won’t take part in the decisions as your vote does not matter. From the other side, if millions of people owning 0.00001% of the company were making decisions, it would have been very slow to respond to the competition.
It’s all quite simple. If you disagree with company’s management, just sell the stocks. And no one is saying that company’s stock will be worth more next month.
I think he should start with burning himself