It's about portrayal against them
Krieg would be shown getting one shot by a basic club strike with no Haki
Kidd would be shown pushing Kaido to a solid mid diff or so (though Oda doesn't show that by feats, but narratively he should be equal to Law who's an Inbetweener)
And in the same vein, both Weevil and King and Queen were shown getting clapped by Aramaki without much effort from him. Dude didn't even seem to whip out the black blade for them