I feel 100% sure if the creator of Warcraft logs was asked to extend the exclusion to Classic logs, they’d be happy to.
The argument that someone else will come up with another site is besides the point. If Warcraftlogs sets the tone, the theoretical upcoming sites will get the message that this is something that people expect to have the option for.
Let me know if you have already sent in a request. If you haven’t, I will be happy to. I’m sure it’s an oversight in any case.