So what? I tried to offer some rates manually just now, they were quickly taken but returned as soon as someone was even a little bit cheaper.

With FRR it's at least relatively safe to assume that loans are not just for 10 minutes... I would sit next to the PC and watch the market if I could make profits from this somewhere close to traders - fighting over making an additional cent today though is not worth my time.

Also if FRR wasn't taken automatically but only manually (just like >=1% offers), then there would be a more healthy fixed rate market. Currently fixed rates only make sense if you are underbidding FRR or want a chance to earn 1h profit of a close to 1% loan (that get returned quickly) in case the FRR wall goes down.