X-wing range and the assumptions of Star Wars

Are X-wings too small for their claimed range unless they use a fantastical power system?

The physical objection is accepted, while extraordinary engines are treated as consistent with a setting that already includes the Force.

An audience objection holds that an X-wing is too small for its claimed range without an extraordinary power source. The physical objection is accepted, but the reply places it within a universe that already includes the Jedi, the Sith, and the Force. Accepting those premises also permits engines that cannot be justified through present-day engineering alone. This is an argument about the assumptions of a fictional setting, not a calculation of fighter endurance.