There is a stigma against educational games because many of them really are boring. Also, the boring ones are often not "games" very much, but just interactive exams. So when people hear "educational game" they automatically assume the worst. Just like some people hear "mobile game" and automatically assume a money-grabbing Skinner box (see also: the backlash over the Diablo Immortal announcement)
If you change the definition of "educational game" from "something that literally teaches you lessons and gives you exams, but looks like a game" to "something that is a game, but also teaches you things", things change. As an example, there are countless Kerbal Space Program players that can intuitively design an interplanetary space exploration mission, without ever taking a single class in rocket science or orbital mechanics. But I doubt they would call Kerbal Space Program an "educational game". Changing the established definition is hard though, I suggest you stop calling it "educational game" and instead call it "game that teaches...accounting".