If you are a PVP player you probably have a TON of pvp gear cluttering up alts, house chests and your bank. Without inventory insight its crazy hard to find the stuff you need plus you have to hop characters which takes forever.
If you are a PVE player you likely have a ton of gear too if you do trials especially if you tank or do multirole.
Personally I do PVP and PVE tank/dps/heal and have over 900 pieces of yellow quality gear across my account. I do have some gear on specific characters but most of it is shared between all 20 characters. With 480 bank spots it is very difficult to play this game and enjoy all its facets. On top of PVP and PVE you also usually make even more sets for infinite archive so its just this endless loop of devs adding more sets and differing content while giving us no break in bank space.
Please, I know there are players like me who don't care about cosmetics but the MOMENT you put bank slots in the battle pass I am in. I really dont care if they are a battle pass thing a crowns thing or a passive gain with CP just give us something.