Not to mention there’s transmog you can only get through crafting. If a recipe drops during a dungeon farm, it’s nice to have the mats to make it.
Regardless, the “It’s time to start fresh” argument is a bit of a slap in the face. Dragonflight is over, would that make it cool for Blizz to wipe any leftover Dragonflight stuff we have in our banks because it’s no longer current?
We’re paying for the time we’re investing into the game. If someone spends 6 hours farming linen, no matter how useless that may seem to someone else, its reasonable to expect that linen to be in the bank where they left it next time they log in. It’s not just about the stuff, it’s also about the time invested. The PAID time invested no less.