Obvious addition:
5. 1 != 6
I have doubts about #2. Weren't Big Tech companies paying senior engineers $300K+ - in 2025-adjusted dollars - back in 2013?
If you know any history, #4 is how many new areas of technology go. A couple ordinary guys built the first working airplane in their bicycle shop. Intel was founded with less than $1M, and fabbed its own chips. Vs. what would be the ante, today, to get into either of those industries?