I would argue that from my experience generalization is not welcomed at all. I'm a founder for 3 companies (in order of starting: ran its course, successful exit, wound down). I have a huge array of skills that I have learned but because I've been a founder and kind of have to have been involved in everything my skills are too general.

What's worse is that there seems to be a real push back against serial founders who are looking to transition from founding companies to working for another company. I've A/B tested my resume with changing my latest startup title from Founder to Product Manager and even though the job requirements state extensive startup experience required, being a founder gets rejected for not having the relevant experience, whilst being a Product Manager I get to the next round as my experience matches what they are looking for.

All in all it's becoming a rather depressing affair.