"Part of what made Luke Skywalker and the entire original trilogy so popular was the fact that anyone could imagine they had the ability to become Luke Skywalker, because he truly felt like an average person who fell into incredible circumstances."

Anyone who thought that didn't pay attention to the original movies. Perhaps his character felt like this but not his actual circumstances nor the actual facts of the matter in the OT. His situation is less average person who fell into incredible circumstances than special person who discovered his special lineage. Like or hate the idea, that was the case in OT. The prequels merely expanded it.

Obi-Wan told Luke his father was a really strong Jedi in the original movie and this was true. As a premise it was there in the beginning.

In Episode 5 Obi-Wan and Yoda emphasized how him and Leia are their last hope. And in Episode 6, Luke says the Force runs strong in his family.

There's absolutely nothing wrong with this btw. Some people are going to be talented than others in some things. That's what made people like Han Solo special, he aas an actual nobody with no powers, who while not being able to best the Force people one on one, was also able to become a hero. The real lesson is, you don't need the Force to become a hero.

As a fan of the original manga, looking forward to this despite it probably won't be good. Never thought I'd see a relatilively niche series like Kakegurui get a Western adaptation.