Because he went through an accelerator. He'll be told for months that the demo day and the pitch will be super-duper important, because investors.

I attended a different accelerator than him (but also corporate and in Berlin), and the idea that bootstrapping may be viable, or even that waiting for another 6 to 12 months when one has real feedback from the market, was never brought up. This is especially sad, because the situation in Berlin is basically inverted to the one in SV: Living costs are cheap, raising (seed) money is hard.

Our Demo Day... afaik no startup got an investment because they met an investor there :-) Afaik, some proceeded to later (>12 months) raise money, one did have success with crowd-funding. But we all wasted a serious amount of time training our pitch...