The problem here is that there are two separate things under discussion: The definition of terms and whether multiple terms can be applied to one thing. The answer, of course, is that multiple can
be applied to one thing. The confusion arises, in part, because in TV and movies things that are labeled Science Fiction are really Horror or Action or Fantasy with either secondary SF elements or simply the use of SF tropes. This gives people the wrong idea about what SF means.
Incidentally, there is
a dedicated Horror channel called Chiller. Also, there is Fear.net, which is available on On Demand on Comcast, and perhaps elsewhere.
^^ And, hopefully, RHW's new show. Defender, I think it is.
Considering the lack of news, it's highly unlikely it will materialize.
I hope that's not the case.