I'm no doubting that there is an advantage to be gain by most in a 36 hole, and many in even 18 - it will vary by course and conditions.
It's difficult to dispute that there's an advantage for most in having a caddy, but they are very rarely banned!
As you move into elite amateur events you are starting to mirror the professional game in many aspects, and buggy policy tends to be one (an absolute advantage cannot be balanced by handicap factors in a scratch event).
It's self correcting in club Q events - arguably if you permit it in those you shouldn't ban it in major/board events because you then disadvantage someone whose handicap is based on having that advantage!
Club golf is supposed to be inclusive, yet here we are yet again looking to make it exclusive.
maybe, i think there are some events that caddies are not allowed, some elite am events anyway.
less of an advantage for younger guys anyway.
But your point about making more exclusive by not allowing them, i would not agree with, Buggies cost to hire, there's even guys at my club who own their own (older guys) if it were allowed by all the richer and able to afford a buggy would have the advantage Shirley