Sure, but consider what you're selecting out with that approach. Recent grads who just need to scrape enough money for a room and some ramen can go all in on their idea. Mid 30's with a family can't. 20's person might find the billion dollar disruptive idea, coming fresh out of a less bounded college experience or youth in general. 30's person might find the billion dollar enterprise solution, having spent 10-15 years in fortune 500 companies.
I have bias to disclose - I'm in the 2nd category, and my ideas and projects are probably very different, with a very different target market, than me 15 years ago (or someone else 15 years younger than me right now). I'm also not seriously pursuing anything at the moment, so this is hypothetical: Not only do I have a roof to keep over my family's head, I also (no offense intended here) probably have a higher opportunity cost as a barrier as well. All in on an idea for me has hard and soft costs that are very different from someone just starting out. It's not to say someone similar to me should expect to throw a few hours every two weeks at a project and merit serious consideration, but putting 25% of time and energy for some is a BFD that I think passes the commitment threshold in certain instances.
Whether it's YC, a startup, or your role in a mature business of any size, you must approach ideas through various lenses beyond your own. Please take this all constructively, I'm not trying to say I'm better because I'm older or anything like that - my point is that there are broader considerations that make varying degrees of commitment to an idea more similar than you'd think.