Military service for the disabled?

Since military service looks so different in this day and age of technology, why do we still bar people with minor disabilities or manageable health conditions from military service? For example-asthma, diabetes, knee problems, a back surgery from which they are fully recovered? Especially when we are allowing folks with major "disabilities" (lost limbs) to stay now, as long as they can still meet standards.

There are so many otherwise able people out there who would have loved to have been allowed to serve, but were denied entry due to a relatively minor condition. I get that the rest of us need to be world-wide qualified, and that means meeting certain physical standards. But there are diabetics and asthmatics out there that can run circles around me. It just seems we could use some of these talented people. And if they happen to not be physically able to make it through basic, why can't we still use their talents at desk jobs stateside?

Civil service isn't the answer. It is too hard to get in to civil service jobs on military bases. Those slots are usually reserved for people with prior military experience. And these folks want to BE military. They want to serve. They want to earn veteran status.

Would you be in favor of creating a new branch of the military that allowed the disabled a chance to serve their country and wear the uniform, earning veteran status, while filling non-physically demanding stateside jobs like clerks, finance, admin, services, etc.? They could augment all the other branches of service, performing tasks we all do now, that meet their physical restrictions. I've thought this made sense since I was first enlisted 20 years ago. I was public affairs then, and there was no reason someone with a disability couldn't do 90-100% of my job.