If you don’t seek feedback because you are afraid it will dent your ego, you will be fine because your ego won’t be dented.
Not seeking or receiving feedback will make you feel good.
But not seeking or getting feedback will dent your business, because people will not buy from you, they will simply walk away and you won’t know why.
The dangerous customer is the one that quietly walks away.
The feedback that your customers will give you is to vote with their wallets and walk away, that is feedback enough.
The same applies to your employees, not seeking or receiving feedback from people around will make you feel good.
Good people will simple leave you, and that’s feedback enough.
You can hide from feedback but the effects of feedback will always find you.