So you feel it's unethical to go into a store and compare prices? Disregard the ethics of 2 different sales channels being able to compete on pricing because of different distribution set ups, but in what universe is it the consumers job to make sure "joe from around the block" has a job at this specific store?

Is it impolite to bust out a phone right in front of a sales rep and say "hold on, let me check amazon", sure. But there's no moral responsibility on the customer's part to do business with anyone because "hey man, it's more expensive for me to run this business".

This isn't some surprise to retail. This has been going on for over a decade. You can't compete with the internet on price for (many) things. But you can compete on immediate availability, customer experience, etc. If you're fighting a price fight with the internet, gtfo of retail.