It makes sense to me, but I also don't like it and don't think it would make sense to the average user.

I would hide these settings in an advanced option where users like myself who know what they are doing can still go to change them if we want.

When it comes to their descriptions, you could have a little (i) icon next to the relay category name and then display a toast message when it is hovered over or clicked on with a bit more detailed description of what that category of relays is for and whether it is for noStrudel only, or will update relay lists that may be used by other clients as well. That would keep the interface looking pretty clean, but still allow the user to access the information they need.

On these type of relay lists I go back and forth between whether the description of what they are for should be as easy to understand as possible, or filled with jargon so that only those who actually understand what they are doing will mess with it. 😂