A theoretical (=conceptual) article is recognized as a scientific article by the scientific community. In my opinion, it can be an excellent contribution for exploratory and descriptive studies, etc. https://www.apa.org/pubs/journals/bar/article-types There are non-scientific interests behind the decision of the journals. For example, position in the database, etc.
There are journals that are willing to accept theoretical papers too. It seems that the theoretical papers somehow lost value in recent times, although this type of publication is very important. Here is what Einstein said about this:
"A theory can be proved by experiment; But no path leads from experiment to the birth of a theory".