I can understand using tor on random websites, since you can’t tell which is tracking you.
With the fediverse you don’t need any PII, only email which you can get by pretty easily. you probably give up your ip, which doesn’t mean much when it comes down to it. However I’m no web expert, so tell me what I should know.
I’d like to think tor is just a precaution, like signing up for an email as a whistleblower, you’d like to have your location more hidden.