No, it's a question of security. AVs are huge and therefore significantly increase the attack surface. They also auto-update all the time which means your computer now talks to one more update server that can be compromised.

Windows Defender is relatively small, doesn't really have any features or fancy UI and updates come from the same servers that your OS updates come from (presumably). That's about as close as you can get to not making it worse by installing an AV.