The cable actuated hydraulic brakes are useful for converting e-bikes that may have a switch integrated in the cable brake levers to hydraulic. There is a use case for them. I am a fan of over-engineering, but those brakes can probably lock up the wheel and will be fine for stopping that bike. The first disc brakes I had were mechanical. They were very fussy, needed frequent adjustments, and squeaked a lot. I almost swore off disc brakes altogether until I tried hydraulic disc brakes.