It's a fair question, and I don't actually think it has anything to do with AI.
For many years there have been services that will offer a suggested route for a VFR flight, taking into account airspace, terrain, obstructions etc. This isn't a use for large-language models; it's a relatively simple best-route algorithm taking into account the things in the way. However to date, we haven't receive a lot of interest in such a feature, so it hasn't got anywhere near being prototyped in SkyDemon.
SkyDemon makes it very easy to plan flights. As another commenter said, the easy process of planning your flight by rubber-banding it to avoid hazards will make you aware of those hazards, which is a good thing. Could an automatic routing algorithm give you a slightly more optimised route? Possibly, but the difference would probably be negligible.