I understand why you do not see many wide angle scopes . I just can't explain it . I am amateur photographer and I'm sure it has to do with the same type of thing that makes it hard to have a wide angle telephoto lens . It has to do with many things I do not know enough about . Maybe someone here with a very good knowlege of camera lenses can explain it . Here is something to check out and you can see why I'm unable to explain this to you . My guess is a rifle scopes have the same issues
First they came for the communists, and I did not speak out - because I was not a communist , Then they came for the socialists, and I did not speak out - because I was not a socialist , Then they came for the trade unionists, and I did not speak out - because I was not a trade unionist , Then they came for the Jews, and I did not speak out - because I was not a Jew , Then they came for me - and there was no one left to speak out for me.