We can probably tell lots of anecdata about whether MBA is an advantage for a startup founder, but I’ll leave a few quotes from well-known people who talked about MBAs:
Perhaps, you talked to investors who said they love MBA founders. Maybe they said that but I’d be careful. Investors can’t be mean to potential billionaires and investors almost never OPENLY say No to an investment.
Now, do I think MBA is worthless? Clearly not! I am getting one. And I have seen plenty of founders with MBAs. I’m just repeating things that I have heard from engineers.
About the second point — what’s not true? The fact that engineers require high salary? Because they do, especially in San Francisco. You will be competing with FAANG companies and those just pay a lot.