Not sure if this was your intention, but your comment came off as somewhat snarky - a theme best reserved for reddit.

It was not advice - but an observation offered as a data-point. You can indeed meet people that run ultra-marathons without running one by going to meetups, fb group events, etc.

FWIW I thought it was a genuine comment. That's really specific, interesting advice in finding the sort of people who'd make good co-founders.

Indeed my comment was genuine. FWIW, I also recently ran my first ultra.