The game does not force you to have a strength based character. If there is heavy stuff you want to sell but can't carry just place the seller near a trader and afterwards send the items directly into their pocket. That is magic.
Also Telekinesis is not magic, telekinesis does not depend on int.
If there were magical hold spaces, those would not depend on int either, because they would be magical infused items.
Also not sure why you think you need so much str to carry stuff anyway. Are you picking up every barrel you find? You still have up to four character to share the weight between them.
Even if you use warfare skills with a mage, as far as I remember warfare itself only increases physical damage, not magical damage. Also not every warfare skill can be used with int or fin, because not every warfare skill depends on the weapon.
Taking away weight depency would just mean, that attributes get even more dumbed down and pointless. The game does not need that, it's is already lost most of its depth.
