The problem is that the alternative is usually only sites created only to chase affiliate revenue. At least on Reddit, there’s a _chance_ I’m reading something from someone genuinely sharing their opinion.
For certain types of searches it isn't a bad idea. Sometimes you want to include unverified testimonials, hearsay and gossip in results. It doesn't necessarily mean that you lose track of how unreliable the source is.
I cringe inside every time I search for something, and the first autocomplete is "mysearchterm reddit"