Paul, Larry, Rich, et al., our society employs nomenclature to identify and define things. It is absolutely necessary to do so if one is to understand what a person, company, or entity is involved in. Whether, or not, one personally wishes to agree with the situation does not factor into things. Simply owning a model railroad, or basic train set, does not somehow automatically make one a model railroader, any more than someone who buys a stamp at the local P.O. to send a letter across town can rightfully call himself as a philatelist. A distinct term, or name, is used to clearly identify what is being done by the individual(s) involved.
For better than half a century the term model railroad hobbyist, or model railroader, has unequivocally meant one who builds examples of a railroad in realistic miniature. The other terms that I pointed earlier are long recognized and were largely accepted definitions of some distinctly different pursuits, or hobbies, involving miniature trains in some fashion. Their practitioners