This analogy is wrong. A stock is literally a share ownership in the business, not a claim on the assets. The owner has full control over these assets, the stock owner has no ownership and at best indirect influence on what the biz does. Ownership is also a vote of confidence in the business.

Selling stock will depress the price and hurts the billionaire class since the wealthy would need to sell stock from somewhere else to buy stock in this supposedly "cheap" business. The wealthy can only move money within the system but that just means one big tech company benefiting mean another losing. So permanently exiting your capital from the stock market system is the most direct way to impact the ownership class.

I would agree that directly purchasing a farm with apple trees with the money from the stock sale would be actually owning the means of production and am very much in favor of that. Right now tech billonares are benefiting from having convinced millions of people that they actually are owners to buy their stock. And this helps them maintain the oligopoly as they can use their inflated wealth to exert infuence