All of this leads to non-technical sales people becoming the de-facto source of product feedback. Which leads to non-technical middle managers making product decisions with a short-term mindset. It's impossible to do a good job under conditions like this, so folks just check out and clock their 40 per week.
I think this is the cause of a lot of burnout. People get emotionally invested in their work, but the way tech is structured, quality doesn't matter as much as velocity. Individuals don't fully understand how much impact their work has, so it can seem like toiling away in obscurity for years on end. That doesn't feel good to anyone, but when the company is making 35% margins it's really easy for them to ignore the cash bonfire.