(I find this topic interesting to talk about and I don't mean to make this a huge criticism of what you're doing. I think it's great any time someone in a position to help early stage startups does so.)I'm definitely not saying that 1000x returns are all that matters, just that they're an inescapable reality.
My understanding is based on what I believe are three facts:
1. A given startup's financial returns can range from 0x to 1000x or more due to the uniquely-high scalability of tech startups.
2. It's impossible to predict how big any particular startup's returns will be (i.e. not even the founders or investors can know).
3. Some very small percentage of any (sufficiently large) startup portfolio will return huge multiples unless you do something incredibly backwards.
I'd imagine that YC generates much more than 12% IRR even excluding their hits. But what makes them so incredibly profitable is their hits. And because of their understanding that the hits are what makes them so profitable, they can rationally afford to be very generous towards all of their startups, which makes great startups want to apply, creating a virtuous cycle.
Creating a firm that tries to be YC-without-the-hits seems totally fine, except if you still end up with huge hits, because then you're just YC with much less founder-friendly terms. It may feel like the conservative and safe approach but it could also be the riskiest possible path, by serving to filter out the best startups.
There's a huge market opportunity for YC competitors that are remote but operate on the same terms. And when someone does this, they'll be first choice for all of the best startups, just like YC is. And it seems smart to compete with what's possible rather than with what currently exists.