Is this hand playable? Well, it can be playable if, for example, there are no bets to you.
Maybe sometimes its not very profitable because you can blow out all your opponent. But its better to get less profit than to lose.
By the way, I must warn you: its not very safe, but poker is like that.
Even experienced players lose their money just for... blinds. What is the best strategy for the Big Blind?
The river brings Qs. There is a possibility that he can win. You bet the same $6, he calls. Showdown What do you think he had? It will not be a surprise for you!