As someone trying to build a product solo, I agree that AI is making it easier to be a generalist. You do have to develop a sense of when to consult an expert vs relying on AI, or you might lose more time while saving money. Case in point - it took a day of vibe coding to optimize my pagespeed.web.dev landing page stats, but I didn't learn much. I should have just pinged the guy who implemented my landing page.
PS: My product: KIN: Family Calendar (https://www.kincalendar.com)