I am sure there is no wear, no bending and no materials from the old gasket.
Clean, shiny and tidy. Just very little scratched cause I used sandpaper to glue the RTV thingy twice.
I just didn't try to RTV without the OEM gasket, cause I didn't want to change the gap distance, but since someone here already does that I guess there won't be any problem.
Just a strange observation I have to add, looks like RTV has poor adhesion to the gasket itself, it's probably made to adhere to aluminium or steel directly and the gasket is painted (rubber-coated someone said here).
I will just be obsessively extra sure that I won't overglue the flange, cause the hole where the coolant goes into the engine block is so tiny, omg! I would risk a guess: Subaru designed all the flanges but the engine head to use RTV, but here manual tells people to use the gasket, so there's no risk of gluing the hole itself LoL