I don't believe this is true. Having any separation between engineering and product is a defect in the organization. I think the best you could argue is that

I don't believe this is true. Having any separation between engineering and product is a defect in the organization. I think the best you could argue is that it's a necessary defect, since it is too rare to find someone who can do the engineering and also keep a perspective on the product. I would argue the opposite, hiring engineers who can't make smart product decisions is like dealing with a shortage of bus drivers by splitting up working the steering wheel and working the pedals into separate jobs. There is some kind of rational thinking behind a strategy like that but it is obviously doomed to be a disaster. Hiring PMs is less obviously stupid, but just as inevitably it is a disaster. If you don't agree, I'm afraid you are like someone who has been on fire their entire life, who will calmly explain how being on fire is fine, and really it's a benefit especially on chilly days. If you ever had the chance to not be on fire for 5 minutes you would stop defending it.