As much as I agree most players put too much emphasis on buying discs...they don't select them very well.
Like thinking things such as:
-what is the most open line to the basket?
-what disc naturally flies this path at 70% effort?
-if I mess up a bit will this disc hold that line or hyzer early or turn over? Which mistake is preferential on this hole?
-would I rather be too short or too long...should I choose a faster or slower disc than "normal" for this distance?
-is it easier to hit a higher line with a slow disc to range it on an open hole, or a faster disc on a lower line to avoid branches?
-if there is wind...then that's a can of worms for most less experienced players as far as disc and line choice.