Doc question about using PAT

[Youssef1313]

In README:

You can create and update comments in another repository by using a PAT instead of GITHUB_TOKEN. The user associated with the PAT must have write access to the repository.

If I'm using a PAT of my account, why do I have to have write access to the repo if I can generally add comments on any public repos as long as the conversation isn't locked?

[peter-evans]

If I'm using a PAT of my account, why do I have to have write access to the repo if I can generally add comments on any public repos as long as the conversation isn't locked?

I can't remember if I've ever tested whether it works to use a PAT to add comments on a repository that I don't have write access to. 🤔
Assuming it doesn't work, my guess would be that its an anti-abuse mechanism. I'm really not sure, though.