How to be great at sales and still get sacked

This is one I’ve seen several times over my (getting long) career. Someone is one of the top performers in a sales team and they still get sacked. How is this possible?
The trick is be super customer-focused and take the opposite approach when dealing with people in your own company.
The person that achieves this trick often says “I’m too busy selling to deal with the political nonsense in my company.”
You have a boss
The problem with this is that when you are in sales you likely have a boss and maybe a boss’s boss etc.
When you don’t deal with the “nonsense in your company” you tend to not use your “smooth selling skills” with your colleagues. You can come across as unpleasant to your colleagues, or even rude.
These colleges may well be in other departments but eventually they report into the top of your company. Somewhere in the reporting tree there is a