If there are Software Architects they are very senior and experienced and hired into a position that asked for a Software Architect. They design entire systems not just a page here or there.
The reason they call themselves software architects is that they're mostly working on software architecture. Granted, the title is overused because scantly few companies have the scale at which it makes sense having a dedicated person for that but I've seen plenty of "art directors" prettying up PowerPoint slides, too.
The problem isn't that there is no such thing as "software architecture", the problem is that it's usually not useful to extract it into a separate role (although that doesn't stop people from trying), making the title more ceremonial than descriptive.
They're not developers, so what is the appropriate term you would apply to them?
Architecht is crossbreed between civil engineer and an artist. "Software architecht" should logically be front end designer/manager.
"Software designer" sounds like it belongs with "web designer" and "print designer". "Software architect" and "software engineer" won't confuse anyone looking for an actual architect or any of the other various flavours of engineers.