Voted "Abolutely". Because i don't find practical scenario where untrusted status of remote support app gives extra gain (more protection) over trusted status.
Here is mine scenario (example):
Supposing there is a whitelisted remote support app on victim's computer. Supposing this app will be granted all necessary permissions (as it is whitelisted) to establish unwanted remote session once it is launched.
So attacker should somehow launch remote support app on victim's host (!). This is only possible if there is a special malware executable on victim's host (!) which is coded to launch that support app. Malware executable would be stopped by Def+.
As you can see in this case it does not matter whether remote support app has trusted status or untrusted.
I can think of more scenarios when trusted VS untrusted does not make difference but these (scenarios) are too integrated.
PS 1. I use remote support app which digital signature i added to trusted vendors.
PS 2. It was already mentioned that one thing makes our discussion useless:
you still need to send your username and passport to the other person
As for me, i prefer "no incoming connections allowed" option of remote support app
