While I agree with your statement, and if I could have it my way, yes, I'd have a full stable of bikes, one for each type of style and use, however....
It's funny that I ran into this thread today, as I was working on a project that I started this weekend for my Daytona 675R.
I'm not exactly turning this bike into a touring bike, I'm just not too keen on leaving my stuff parked with a soft tail bag, and couldn't find much in hard case options for this bike.
I do commute about 60 miles a day, so it just makes my life a bit easier having a hard case for my change of clothes, etc.
When I took off the rear fairings, I found some unused through holes in the frame, I'm guessing it's shared with the street triple frame?
Instead of paying for some $400+ hardcase, I had an empty waterproof $30 Ridgid tool case lying around that looked pretty nice when bolted up to the bike.
Still a work in progress, but I'm happy with the results so far!
So yeah, I'm one of those that's crossing out of the sport bike category with my accessory