Luke wasn't lying, why would he? He had a friend who backed him up. I know the T-16 wasn't a fighter but...
"... the controls for the T-16 Skyhopper were very similar to the controls of an X-Wing fighter. So much so that the rebels used them to train pilots. T-16's were a ubiquitous vehicle and therefore easy enough for the Rebels to get their hands on for training purposes, much more so than X-Wings."
It's better writing. We get this background from Luke. We see him with his model sky hopper and then it kind of jumps to that next level, where he does something almost hard to believe. I don't think anyone entirely believes he should have been able to mix it with experienced pilots but I believed him more than Rey! Come on she got in not just an ordinary craft she got in an iconic piece of Star Wars and got to Han level in a blink of an eyelid.
Seriously are the controls off a landspeeder the same? Must be, huh.