Hot take, I see no issue with this. If you're savvy enough to know about Tor and its purpose, you're also savvy enough to know how to add a security exclusion in Defender. People who don't know how to whitelist a program in Defender probably did not install Tor themselves and won't be safe using a program with the capability to access the dark web.

It's extra frustration for those trying to legitimately use Tor, but it's also a safety check in the case of an unintended install.

https://www.techradar.com/pro/security/microsoft-defender-will-finally-stop-claiming-tor-is-malware

Microsoft Defender will finally stop claiming Tor is malware.

It's funny that recently NetworkChuck uploaded video about darkweb where he installed tor on windows and now apparently many folks did the same.