For me it was "buy high quality pillow" because you sleep for one thrid of a day etc. I needed a new pillow anyway so I came to the store and bought the best they had. And it was ... ok. Like it's a fine pillow but my sleeping haven't improved really, it's basically the same. So I was disapointed :(
I had just sold a car and was flush with cash so before going to buy my new one I bought every single pillow I could find in every home goods store near me and several from online. I then spent the next month studiously comparing pillows to find the right one for me.
The final two came down to a $15 pillow and a $190 pillow.
After deciding all the other pillows got returned and then went and got my new car.
In things as subjective as a pillow high quality is rather Nebulous.
For something like a woodworking tool high quality often matters far more.
The worst life pro tip I've ever received? Listen to the experts, they have made it their job to know the best things and you can't go wrong with what they say.