If there're a projects were complicated or hard to understand what is the real purpose of it or use of those projects, then thos projects are probably not going farther, and the reason why many people say those projects are mostly scam because usually those projects doesn't reach its goal and that's the main reason many people got disappointed on that kinds of projects.
I think that's not a problem in the crypto world. It could be as complicated as it gets and we will still understand it. There are way too many people who would be willing to actually end up understanding and helping other people on this subject. That's why I think there is no need for worrying, just let it be.
That's why people are not worried, because there are others who are fine with these things and that means everyone can create a project that is super complicated and eventually there will be at least one (probably a lot more) person that will understand it and explain it to people easily so that everyone can understand, as long as we have those people, there is no coin that would make it too complicated that nobody would understand, that's going to be tough because there are very smart people in the crypto world and they would understand.