I'm not convinced there is a "technical side" and "artistic side" beyond the very basics. Assuming goals of art and meaning, photography is a process of seeing; and therefore to assume overly broad generalisations and privilege say "portraiture" over aspects of "landscape" is absurd. Although Ansel Adams is not my favourite photographer as such, I am very dubious of the notion that HCB could be considered superior in some ill-defined sense.