There's some argument for shipping those questions over here, and not just centered around the file things neatly because everything has its place manner of thinking. Stack Overflow, today, doesn't really like those kinds of questions1 and many would be happy to ship the impetus for folks to ask them over here.
But that's just it, Stack Overflow loses content, users lose rep (depending) and we're not exactly sending anything over to Programmers that offers anyone here anything to do. It's a bit too jilting of an experience for all involved in comparison with a vague net gain.
There's also the folks that ask specifically on Stack Overflow because they feel that more capable eyes will see their question. That usually doesn't work out very well, but it's easy to see how folks would conclude that it would.
There's always going to be overlap, and as Programmers has become a more focused site and community, it's gotten to the point where Programmers is the better site for certain topics that overlap, tags you mentioned being some of those topics. That's basically what has to happen for the majority of those questions to naturally end up here - just keep answering them here with the quality you've been producing - then people know this is the place to come.
There are instances where we'd basically wholesale migrate by tag - when we purposefully split a site into two - most recently turning AVP (Audio & Video Production) into Video Production, and then moving the Audio stuff over to Sound Design. That's not something we like to do unless it's clear that we positively must, and it's not like the tags on Stack Overflow create multiple disenfranchised communities that try to co-exist in the same space.
I'd say - give it a year, and you'll probably see the 'brand' this site is building become more effective at leading folks with those kinds of questions here in the first place, at which point you'll see the tags diminish on SO.
1 Well, sometimes they do, depends on how and when you ask them.