The trick big tech uses to solve this is to not just pay extra for above average engineering talent, they pay extra for above average talent in all areas. So the people you talk to are almost always pretty reasonable and understanding, they want things done and complains but they don't ask for the impossible or unreasonable.
I think itβs deeper than that - these companies place product/engineering at the centre of the business, rather than at traditional companies that still see it as a cost centre.
Product managers and UX engineers are there to do product management or UX design, not to filter information from the rest of the company to programmers. That means that most of sales requests are better forwarded to a product manager or UX designer, but there is nothing stopping them from directly filing a bug report to a developer and chatting about potential fixes/timelines etc. Also if some feature is important the product manager can just tell them to talk directly with the relevant engineer to get the feature done.