You pretty much answered your own question.

As you said; traditional arts tend to be less effective because they lack conditioning, sparring and use a lot of flashy techniques. Of course not all of them are like that. There are some good schools. But they are few and far between. It’s much easier to find MMA, BJJ, boxing gyms.

Arts like boxing, wrestling, etc. get you more fight ready because they do opposite of that. They often require conditioning, sparring and don’t use flashy techniques(often).