I'm just a commercial photographer so what do I know. But this is the way i see all this. There seem to be at least two different reasons why you'd want to go to the extremes of having your monitor standardized. But the reasons for these two ways are quite different:
A. Closed Loop: You're in the business of making prints, and you want your monitor to match your printer. That's all you care about. You just want to tweak your image, and then send it properly to the printing software, and when the print pops out, it pretty much matches on the first print. (I am not this guy).
B. Open Loop: You're making images destined for outside clients, probably going to CMYK. You shoot a job, you retouch it, and you simply FTP the final file, and you never even make a proof. You just want to think, in your mind, that your monitor that sits on your desk "matches" some universal standard that exists around THE WORLD for the most part. IOW, if i opened that TIFF file in Pittsburg, or LA, or NYC, it would look the same in Photoshop. You simply want to FTP the file without getting a phone call from a pre press house or the ad agency, saying, "Wow, we love the picture, but boy, it sure does feel a tad light, and a tad magenta". (I am this guy).
So in theory, I want to buy a puck and some software that runs, and then it builds a profile, and that software does not give me ANY choices. The software says, "Screw you, you can't work in a bright room. Buy some blinds for your damn windows. We're not gonna read the ambient in your room and adjust OUR profile. YOU are going to change your room to adjust to ME". And the software also says, "Screw you -- the CT is 6500. There are no other choices. Deal with it. That is the universal standard".
When we started all this Digital Mess, ten years ago or so, this is where I thought it would all be headed, but it's just as random and non-standardized now, in 2013, as it ever was. Yeah, frustrating.
There should not be a Moving Target. The software should also have an option to say, "Your monitor sucks. It simply won't calibrate to a universal standard. You buy a real computer and a real monitor. Deal with it".