You sound like the pointy haired boss in the Dilbert cartoons. You admit that you're not a coder, whereas your friends are "good programmers", but you want to throw away their half decade (each) of experience because you would prefer to go with a buzzword language because it sounds cooler.

If they don't have experience in these other languages, the MVP will take longer to produce and will likely be of lower quality if you just shut up and let them do what they do.

If you're not going to be coding this, or if you are but aren't going to be one of the lead programmers, then the choice of language really doesn't matter to you.

Why are you second guessing people that you admit know more about the subject than you do?