I did not find it emotionally stressful. Just a lot of work & hassle. Which is what led me to my advice of dripping it out slowly and steadily, not waiting until an impending move forced a mad slapdash 24/7 flail to dispose of stuff.
It takes all kinds.
Late wife and I used to sorta collect books. Or rather gather books; there was no curation & no “complete the set” thinking.
At one point we realized we owned 1000 books we had never read and in all likelihood would never read. Books were a religious talisman for a life of erudition we were not actually living, just pretending to hope to someday live.
They all disappeared without a tear the next week. They then represented folly & hubris in the buying, not learning in the (non)reading.
IMO most human folly is a reasonable behavioral response to false, ignorant, or wishful thinking.
Purge the false thinking and the false behaviors fall away effortlessly.