There's a couple of things wrong with this statement. First, you certainly can choose what you download with PS+, it's just a smaller selection that you choose from. It's no different from saying that you don't get choose what games appear on the console in the first place though.
Second, PS+ is the kind of subscription that doesn't really feel much like being held hostage because for the money you plunk down annually, you get access to a lot more cost savings in the games you don't have to outright pay for. Many of the games you get for "free" on PS+ are at least $10-20 without the PS+ sub, so it only takes a few to compensate for the sub's cost and then everything else is gravy. In a year alone, PS+ probably gives me access to enough games that I want to play that would cost 2-3 yrs worth of PS+ subscription on their own.
Are you serious? You're given a choice of a few games every month and you neve know for sure what games will pop up, are you seriously comparing that with the choice from an entire catalogue of a console?
Look, I like PS+, I think it's a great service and Sony managed it very well, and it provides great value, especially if you don't mind not owning the games, but that's the thing, you don't own then and you are hostage to a subscription. Especially on PS4, want to play online? Got to pay. Want to play the games you got when you had plus? Got to pay. If you only play once in a while, the value greatly decreases. If that's not being held hostage, I don't know what is. That's Ok (the games part, the paying for online sucks), I'm not expecting them tong I've out games, but compared to Steam and bundle sales, it's a world of difference.
I don't mean to bash or attack ps4 or plus, or saying it's a stupid buy, not at all, I was just mentioning the savings you get on PC and anticipating that someone would say PS+ gives you free games.