OK. This is a reasonable answer; Amazon is good for 95% of the market and you shouldn't attempt to use it to fulfill the remaining 5%. That's correct: I use digikey or mouser to order precision and power resistors (for the 5% of the time I need either of those instead of a generic cheapie). I use mcmaster for some parts that amazon doesn't stock (or what they stock looks dodgy).

But over the years "what is precision" has changed. For example, I can buy micrometer stage on Amazon for $100 that is as accurate as the $10000 stage from 10 years ago.

Also, I think most electronics parts are engineered with 3X so I wouyld expect my 0.25W resistor from amazon to smoke itself at 0.75W and the one from digikey at 1W.