Moral, ethical, and legal are three different things. Sometimes laws happen to match the ethics and morals of private individuals, other times not.
But also, if you want to get into publishing, it would serve you well to understand copyright as it applies to your work.
I think it fair to say that my grasp on copyright is quite clear. I have researched, filed and successfully acquired copyright in 2 countries. I have differentiated that I understand mechanics/ideas are not copyright material. As you say there is a difference between Moral ethical and legal. Of the three I have also noted in past responses that I also know the difference.
My overall point was to question how moral appears in one practice, but not the other. I also cited a specific instance I witness of someone took directly from someone elses system to apply directly to their own. There was no call out, only applause which, as you can imagine from my standpoint, seemed counter to my own approach thus far.
I also can appreciate your point on, I may not have the game changing mechanics that will revolutionize the RPG scene to come. But, if I did, is not my hesitation , some what understandable? I have a lot wrapped up in this, more than a great many people. Decades and then some. I must play my hand carefully. It isn't something I want to away freely....not yet. There are steps I must take first before that could happen.
That said, through my experiences on Reddit, Here and else where I have come to understand the culture is very shareable material based. As I said I am not used to that at all, but I get the message. I am developing a method to .... begin to share. Something that people can get a taste of , without me sacrificing years of work. Depending on the reaction, I may release more, or change direction.
Again I pretty much get one shot at this. I am currently working on 4th and 5th expansion. When I launch there will be much to partake of.