We have to be named something. I am the Founder of the company. That is a no brainer. I am also the President, as I set the strategy for the company (this is traditionally what the President does).
I do not make 95% of executive leadership decisions. The CEO does. Which again, is the definition of the term.
So no, I am not buying into the SV groupthink. Just because other startups use VP/SVP/"manager" doesn't make it non-SV. They're just... correct terms.
If you have a 6 man company with titles like "President and Founder" and "CEO", you're buying into the SV groupthink a little.
Outside of SV, in the world of small/medium business (for which I've consulted), I don't think I've ever heard the title "CEO". Meanwhile, I've gone to tech conferences and have seen sole-proprietors refer to themselves as the CEO.