I don't think they're typically a useful path for finding a relationship either, so I don't necessarily advise having them around even if one is single. This is especially true for those of us who are not keen on "the scene".
You would be, objectively, incorrect in this thought. The stats on how people -- gay and straight -- are meeting these days indicate that a significant number of people currently in relationships met through some form of online interaction such as an app or dating website. Apparently around 12% of people in relationships report having met via an app:
Pew: 30% of US adults have used online dating; 12% found a committed relationship from it – TechCrunch So, for people seeking relationships, apps are part of the mix.
Anecdotally too, your assertion has problems. I met my husband of 17 years chatting online. After our divorce, my next two relationships (4 years for one, and my current one going on 3 years) came via meeting on apps. Nearly all of my friends who are in long term relationships met via some form of online interaction -- not necessarily "hookup" apps, but OKCupid, Meetup, and others.
As with all things, you get out of it what you put into it. Also, as with the entire history of relationships, you have to meet people in order to meet a partner. Apps are one way. Standing in bars is another. As is attending church. And winking at your barista. And going to the gym. And going to school...
This is why I would also dispute your overly broad generalization about "the scene" as there's really no "the" scene. There are may "scenes" and they're no better or worse than other scenes. The twinks whose scene is the rock climbing gym then going to an EDM concert are a very different scene from the bears in Guerneville, versus the mix of men at SF's The Edge (especially on Showtunes night), etc. Personally I'm not into the "rolling Mollie and sweating to trance music" scene, but I'm really into the "stand at the wine bar and try the new vintage of Chablis" scene.
Granted, in the era of COVID-19, none of us should be availing ourselves of any scene... at the moment.
Cheers!