I think the only problem here is the strongness with which it is worded. It would be fair to say one of the reasons he is doing it is because of stock price, but to assert the only reason he is doing it is to cast him as completely uncaring about security and privacy. Without evidence to back this up (in this case, evidence that he doesn't care about security and privacy), it's an attack on his character. It's entirely possible his reasons include both, and that the moral sentiment behind the message is entirely truthful.

We should be careful about plainly stating what someone else's motivations are when it contradicts their own story.

Edit: s/it's/his reasons include/ for clarification.