But a lot of people do do that, but they don't buy anything and then go home and order online what they looked at.The benefit of physical shopping is that you can go home with what you want and when you want it, you don't have to wait for it to be delivered or pay for the delivery or hope that someone is at home when it is delivered.
When I go shopping for clothes (once or twice a year at most!), I like to prod and poke the merchandise to check the quality and see what it looks like 'in the flesh', you can't do that online.
I also like to support small independent retailers and producers where I can.