thanks!

but these two restrictions from/to the same way aren't needed (if they were we'd need them on every single road at an intersection).

https://www.openstreetmap.org/relation/19267503
https://www.openstreetmap.org/relation/19267500

most routers will apply sensible defaults and not request to do a uturn from/to itself via a single node.

where we do need those no u-turns are at traffic lights where the from/to are different ways (eg on a dual carriageway) since some routers will otherwise ask you to u-turn at traffic lights where you can't.

It's probably the iD editors fault those as it shows these same to/from restrictions as being allowed by default but they aren't.