The conversation is about the dropbox founder quitting his job to wok on dropbox part-time.
The problem I see with pg's logic is that the founder and YC are not betting the same value on the company. The way I see it, YC is asked to bet some money, but the founder is asked to bet everything they got. If YC was asked to bet everything they had on that one company, they'd say no. In that case, having a plan B is not a sign of lack of resolve, it's a sign of sanity.
But I'm probably missing something. I really don't have the whatsitcalled, entrepreneurial spirit. It all looks like gambling to me and I hate gambling, especially when the odds are stacked against me; which they always are, otherwise it's not gambling. So I guess I don't get it.
I'm not arguing that people who don't quit their jobs don't have amazing ideas; it's just that to make a startup work as a business requires so much effort, it's likely that if you're not able to quit to work on it, you'll lose out to a team that can.
PS: I'm saying this as a founder who quit his job (as did my co-founder) when it looked liked we had something, and I doubt Overleaf would be where it is today if we'd not. So I may be biased in that direction!
Edit: hansvm is right, Overleaf is cool :)
Not to mention, the UI is easy and (shockingly in this day and age) gets out of my way so I can focus on the content.
And easy pricing tiers. For just $15 a month I get a 10-collaborator project. Thanks Overleaf team!