I've seen this kind of training heavily advised for calves and abs. What about delts? They're in constant use all day as well being the main mover in your arms. I know it may sound crazy but think about it.
you would be better to train traps/rhomboids daily with the logic you have. I see where your going with it and its not inherently wrong-its just the shoulder complex is unstable at best. If you build your traps and rhomboids-along with proper rotator cuff prehab-you will be able to have a more solid base from which to train your shoulders with more frequency if you so chose.
I wouldn't advise constant heavy training on delts/shoulders. I am 39 and the injury I see so many suffering from next to back problems is shoulder issues. My shoulders still pop from all the heavy work I put in over the years.
I mean, at 5'10" 245, whatever you are doing is working. lol I think my comment was more in general for those thinking about it.
I use and sit on my a$$ everyday that doesn't mean I want to give it more punishment than the norm.