Heh, seriously. I know tons of couples who met on "traditional dating sites"; whereas if I found out someone I knew used tinder I would consider them pretty skeevy and would (metaphorically) inch away slowly.
I assume you're applying the same standard to people who met in a bar?
Really, this is entirely your problem. I've never used dating services or apps, but I've had several great long-term relationships which started in a variety of weird ways. That's just life, man.