You're in a bubble. ~99% of the population is not on reddit/lemmy or other android communities where they could discover new apps. They find out about new apps from friends, from news articles, or through the Play Store.
You've kind of argued against yourself there, we techies get our recommendation from news articles and friends too (you could consider Reddit/Lemmy as a sort of combo of the two), so if everyone's doing that then you still don't need the play store recommending you stuff!