Well the only thing the OP "cares" about is the fact that sarongs only have an INT requirement. He/she points out that sarongs either should have no requirements, STR/DEX or INT requirements or should be solely reserved for INT classes. (yeah yeah I know this game does not have a linear class system, don't angle shoot me for that... just summing it up.)
Personally, I do not really mind, as it is not like a sarong will make the difference between being able to complete the game or not. However I do see what the OP is pointing out and wether I agree or not I think he or she does have a valid point. Logic for an INT only requirement on a misc. item slot which is available for everyone is a bit questionable.
I can obviously not fix the problem as it is simply not in my power to do so. The only relatively simple solution I can offer is the following: If you feel that sarongs in general should have no minimum ability requirement and you are playing a character which is either heavily based on dexterity or strength use a cheat engine or save game editor and grab upto +4 intelligence solely for the reason of wearing a sarong. Ofcourse adding upto +4 intelligence for free makes it so that a point into withcraft or other elemental schools suddenly become really good as a lot of spells suddenely have a 100% chance instead of the 70% chance, so depending on how you want to play your game it might be "fair" to stay away from using the +4 intelligence for anything other then just wearing the sarong.
I understand that the "solution" I offered is far from perfect because it involves you to actively "fix" things, but the only other reasonable solution is to change the game files and alter all sarongs.
With kind regards,
Rashar