A culture that is designed to exclude people upfront is never a culture — it is a fascistic process.

Cultures should serve people — not people cultures.

What is a culture worth that cannot include different point of views and personalities?

If your success depends on the personalities in your teams and not capabilities — you are doing it wrong.

I wouldn't hire a PM at all. I would hire an engineer of experience — because that is what they learn at university. Every PM I ever met made every problem and every solution a personal issue — feeding endless — well: culture wars.

PMs turn engineers into kids so that they have something to do as they actually wouldn't know how to handle engineers like grownups.

If a PM has not 10 better 20 years experience as an engineer under his belt, they probably will not contribute to the solution — but problems.

Btw: your assumption is wrong: I had immediately a job — as I became CTO in the company I cofounded directly after leaving university. I blame that experience for my — well, you would say: unpleasant view on our work force. I always hired people when they showed interesting thinking — everything else is easily teachable — including rules of behaviour and programming tools and languages — but finding unique ways of seeing the world and unique ways of thinking is the real challenge in knowledge work hiring.

if you dont hire someone, because you assume they might not fit in, than you are the problem. also: what are probation periods for?

PS: I left the company few years ago, but it was sold for 100,000,000€ recently — so neither my technical contribution nor my hiring can have been that wrong.