I think the wrong question is being asked. The question is, why would you
not use a turnbuckle mechanism when supporting a floor? All teams are doing this. These systems have tolerance stackups. The distance between two points in space in the cad model will be different to that of those points in real life. If you don't build in adjustability you won't be able to position the parts properly.
Look at the diffuser on this GTE car. The entire rear is supposed by turnbuckles. It's not an elaborate scheme to run a hydraulic floor...It's just a very basic concept in the design of overly constrained systems.
A lion must kill its prey.