This is just nonsense. Anyone can sell the stock if they wish, there is no privilege for the high-net worth. Additionally, shareholders benefit from reduced share count because it increases their claim on future profits thereby increasing compounding.
Buybacks are still better if you want to hold forever and don't care about share price. With a dividend distribution you must pay taxes and reinvest the diminished proceeds. You end up with a smaller share of the company than in the buyback scenario. Example:
A: Hold $10 of stock. Buyback of 1$ per share. You're left with $10 of stock. B: Hold $10 of stock. Dividend of 1$ per share. You're left with 9$ of stock and $1 cash - taxes payed. Once reinvested you have $9 + (1 * tax rate) in stock.
You're making two mistakes: One is thinking that dividends are magic money that do not cause share prices to fall in exact accordance with the distribution and the other is that buybacks lift the share price somehow (they do not, see Modigliani-Miller).
You're mixing up points 2 and 3. Anyone can sell, but buybacks benefit mostly sellers.
Borrowing against stock is mostly something for HNW people.
> shareeholders benefit from reduced share count because it increases their claim on future profits
So...dividends? Or when they eventually sell? What if I never want to sell?