I avoid talking to people because most businesses don't have my priorities. I want to buy something because I need it, and they want to convince me that I want

I avoid talking to people because most businesses don't have my priorities. I want to buy something because I need it, and they want to convince me that I want product features I won't use or to spend more money than I thought I did. Everyone says they want to "make the customer happy," but it seems like the only companies that actually make me happy are in the tech industry and the restaurant industry. Everyone else just spends their time bugging me. When I was younger, I was influenced by salesmen saying, "Oh, look how awesome the frobulator is!" So I'd be excited about the frobulator, and then I'd get home and realize that I don't actually need one. Or I might also be too engaged in conversation to investigate problems in the product like I should have. But too late, I already bought it. I find this happens less as I age, but the instances are more subtle and more money is at stake