OK, for me code = diff, it can add lines and it can remove lines.
My point is that one shouldn't be close minded on others.
Disalowwing PRs is just like closing your ears because you don't want to hear the other person arguments - IRL you avoid such peoples, in virtual one you should avoid them too.
Why is this an unacceptable choice? Yes, accepting PRs from the broader community and spending time on them has a good chance of making the product superior over time. But just like how it is probably good for me to understand the impact of my purchasing choices on the environment, I can't listen to it all the time. I don't think it is unreasonable to say "in this context, I do not have the bandwidth to manage unsolicited advice from others". That isn't "being close minded". It isn't saying that nobody else has good ideas. It is saying that you are busy right now.
