Not really a need to be upset about this.
I thought Galaxy's Edge went above and beyond and trying to create a narrative explanation for just about everything - despite obviously being a Star Wars theme park (theme area?) grounded in real life.
In context, you are building a lightsaber "in secret" to keep a tradition alive. It is presented as an incredibly intimate ceremony, full of reverence for the Force and its practitioners. You are not canonized as a Jedi, but it is done in a way where a young child could totally believe they've been empowered to be one in their own head canon. For everyone else it is just respectful fanservice/tribute.
Even if I was a nobody in the Star Wars universe (with some cash to burn) I can imagine the appeal of an experience like this, and giving my money to a good natured rebel trying to keep a tradition alive. Real people have paid more money for less interesting collector shit, so I guess I don't understand what is so unbelievable about doing it in a fantasy setting.