Around what Elo rating starts separating the casual chess players from more serious ones?

Not sure how else to word this, but basically at what Elo do you start running into more serious chess players? I personally think it’s around 14-1500. What do you guys think?

Edit: what I’ve gathered so far is that everyone on Reddit is at LEAST a 1700 or better, and have done so without putting any sort of real effort in. Which makes you think why are they not playing in real tournaments if they’re this good playing just for ‘funnsies’ 🥱