An observation on a Spacewalker might serve to illustrate. The design has a generous low wing with a high thrust line, and given a more than scale power plant results in a down pitch couple between the drag of the wing and the thrust of the engine. Up elevator is needed to trim the plane for full power to counter the pitch couple but when off power, trim needs returned to neutral elevator.

So... should that couple be countered with up thrust? Sure... it would work... but up thrust looks really goofy plus the Spacewalker has a spinner that fits to a forward cowl boss and adjusting it would malign the spinner and cowl unless the engine mount was moved on the firewall a small amount and that would require slotted mounts and perhaps several efforts to shim and slide the mount after removing/reinstalling the cowl each time. It could be done with considerable physical effort, but why when it can be done far easier electronically within the Tx and we wouldn't be making the plane look goofy.