Have transfers been harmful to classic?

[Stopdisplz-azshara]

Blizzard themself said it does not harm the playerbase and its barely adding up to anything:

Addressing Population Concerns in WoW Classic

Hello! First and foremost, thank you to everyone who posted in the discussion thread about this difficult challenge. We’re going to use layering to address the most severe queues. There have been thoughtful posts there and elsewhere on all sides of this issue, and I want to take some time to talk about the most prominent concerns that were raised. Considering the current population issue, both players and our co-workers on the WoW team have wanted to try many different solutions before layerin…

@Kaivax

but Paid Character Transfers represent a very small number of players

This is why I dont understand why they lock servers for transfers but fresh people can create new characters.