Yeah, they're definitely popular right now. It's hard to start a woodworking YouTube channel without one.
But you don't have to buy and use one if you don't want to. I have a biscuit joiner that hasn't seen the light of day in at least 15 years. I also have some doweling jigs that I hate to use. So I would have no use for one. But if someone else wants to buy and use one, it doesn't hurt my feelings. I'm sure lots of people will say they're indispensable to their workflow. And that's a perfectly valid point of view.