Its easier and cheaper (and a lil safer) to run wires to the up\down control lever and have those actuate a valve somewhere, than it is to run hydraulic hoses to a lever like in lifts of old, for example.

That said it could also be run by whatever the equivalent of "PLC on an 8bit Microcontroller" is, and not some full embedded Windows system with live online virus protection so yeah, what the hell.