I don’t understand what point you’re making here.
We already know from years ago some users will go to extraordinary lengths to give some new accounts (usually second accounts for someone already in the guild) a massive head start in the game. If this idea were implemented, it would 100% definitely be exploited by some.
And, given how many 13M+ accounts have already taken every farmable character to relic level and are sitting on a mountain of unneeded gear, an account could massively improve their inventory very quickly in the right guild with the right friends.
-1 from me.