Other than that I can afford them, this is how I see it. I'd rather spend more money to buy fewer quality pieces which won't fall apart after 2 seasons. I look after my bags well (but not hugely fussy) so they look good for their age. And if I ever get tired of any, I can still get some money back for reselling them. The cheap ones don't have any residue value at all. You are pretty much throwing them away afterwards.
I do not look at bags as investments, resale value is not on the table at all.
Today I am using a Kate Spade bag I got 5 or more years ago. It has no signs of wear other than small scratches (it is stiff leather). I think I spent $150 on it. I got my value out of it. A more expensive bag would have not had more value. If I were to get rid of it, someone else could get plenty of use.
I also haven’t had problems with bags falling apart - after a minimum bar of price.
I think there is also a distinction between luxury fashion and luxury craftsmanship. Unfortunately a lot of premium priced bags do not offer much more than fashion.
While there is a difference in luxury craftsmanship, there is a point of diminishing returns. You can get a bag that lasts for far less than Hermès or Chanel.