I guess companies don’t want to risk their customers coming back with ruined bags, complaining that “you told me it was ok to clean it with ___!”
Some even have their own branded products that they recommend, but they can be hit or miss too. Like
coach cleaner/conditioner. I once bought a store brand shoe conditioner along with boots (can’t remember the name, it was in Italy), and it ruined the boots.
I’m now wary about applying anything to my bags except Cadillac, but the funny thing is that I’ve actually been doing a lot of research into car detailing products because I’ve been pondering what to use on old lv coated canvas. The coating is some type of plastic (pvc or pu), so I wonder if this is where a car product might actually do some good? Most car leather conditioners are actually formulated for leather AND vinyl/rubber because car seat leather is coated with a type of plastic, and they can be used on most car interior plastics as well to prevent cracking and fading. I’ve read about people using armor all in bags, but armor all is actually scorned by car detailers nowadays and there are much better rated products available now.