Theory in HCI research appears to be of interest to a number of researchers working in the field. Theory use, which refers to the different roles or functions theory may play in scholarly research or publishing, is one way of exploring the topic, but, in my view, neither topic has been framed as an HCI problem.
Each has been framed as a problem of maturity (or, more accurately, one of immaturity) and, perhaps more recently, as a problem of identity. But these framings transcend the field of HCI research. They are (and have been) relevant to many other academic disciplines.
To the extent that HCI is grappling with its maturity (or immaturity) and/or its identity as an intellectual community, theory and theory use are relevant topics of study. But they have not been formulated or engaged with in terms of human-computer interaction. Such a formulation will be a necessary, good step forward in the discourse.