If people are choosing to buy the stock, why does it matter if the seller is the company rather than anyone else in the world? The purchasers are getting the same deal. If it's perfectly fine for a purchaser to pay a random investor $2.58 for a share of Hertz, it should be fine for them to purchase the exact same share for $2.58 when the counter party happens to be Hertz.

If Hertz had been dishonest or misleading about the situation then that would be a problem, but they were completely upfront about the risks.