I have to disagree, to a point. People frequently have certain deal-breakers, which are basic points of compatibility. For instance, I have no interest in dating a smoker. I don't want someone like that in my life; I can't stand being around tobacco smoke and sure as hell don't want someone smoking in bed with me. That's a basic deal-breaker. But Tinder doesn't allow me to see that about people, whereas any other dating site has that as one of the basic parameters, so you could meet someone and start talking, meet them in person, and then find out they're just not relationship material because of a basic deal-breaker like this. This is just one example, other people have other (and multiple) deal-breakers; maybe they don't want to date someone who thinks the Earth is 6000 years old, or who loves having a bunch of giant dogs and other animals around the house, etc. You may like someone, but that doesn't mean you can actually share a home with them if you can't get along on basic things.
In fact, I'd say the fact that *most* people don't screen people based on parameters like this (because most people do not find their partners on dating sites, but rather at bars or other meatspace places where these parameters are again not always apparent) could be one of the reasons the divorce rate is so high. You're right, people *aren't* picking well; they're using too much emotion, instead of screening people out who are simply bad matches for reasons like these, and then looking to see who they have chemistry with. They have some fairy-tale notion that they're going to run into Mr./Ms. Right at the supermarket or something and hit it off. Sure, you might meet someone attractive that you have chemistry with like that (or more likely, at a bar), but then it turns out you have serious compatibility problems. But if you've gotten emotionally attached already, you're likely to overlook that stuff, and then when you finally do break up, it's really messy, when you should have simply said "no thanks" right at the beginning.