His point is, that at least half of the share holders are not happy selling for that price. Selling is a personal decision, and if at least half are not happy to be forced to sell, I don't see it being a good idea.

Even if the optimal price that's some supernatural being will suggest is lower than current price, it is still the decision of the share holders.

Optimism and hopes are worth a price, you are in ycombinator.com, a major buyer of optimism and hopes.