The median US net worth is about $121k [0]. When you're talking about having $300k available to put into stocks, and saying "Just buy the stock.", that is something entirely out of reach for the majority of people.
The OP said they opened their position 5 years ago, when the price of NVDA was 20 times less. So they probably only invested about $15K out of that median $120K net worth.
The median net worth represents assets you own, not cash on hand. When someone has a median net worth of 120k that is likely the value of their house minus the outstanding debt their car and their pension fund, and unless you're willing to take a loan out on your house to gamble on the stock market, the median American does not have 15k to buy stock. In fact the median American can barely cover 400$ in emergency bills.
xwdv started his post by saying that having significant stock was not something restricted to an elite few, and then followed up by giving examples that directly contradict that point. My goal wasn't to comment on the graphics cards themselves, but rather to add support against the pervasive and self-destructive idea that maximizing the value of the shareholders is the sole duty of a corporation.
[0] https://www.cnbc.com/select/average-net-worth-by-age/