You have some credence in what you say. That there are civilian jobs out there, who deserve more respect than what they actually get. But to compare it to the military was the wrong way to go about doing it.
First of all, even if you meant no disrespect to those who choose to wear the uniform, you still imply a level of disrespect to those people for even bringing it up. No matter the country, no matter the position held during their time in the military. I highly recommend that such words be kept to yourself.
See what I mean? I offered sound advice, but in the wrong context this could be taken as a threat as well. No where did I mention anything about a threat, but it is easily implied. Its the same when doing a comparison on this level.
Put it this way, people in the military are on call 24 hours a day. Even if they take vacation time, in the event of an emergency they must pack up and go back as fast as possible. Furthermore, it is completely possible for a military individual to work a full 24 hour shift. Get 8 hours of rest, rinse and repeat until it is no longer necessary. While this is an extreme case, it is not uncommon for a military member to work over 12 hours a day, 6-7 days a week. and regardless of how much extra time they put in at work, they still get the same pay. This is all in addition to doing their part of defending their country, with their life at stake.
When compared to the military, sure a Doctor could potentially save lives. But their life is technically never in danger itself. So while they do what they can to keep your loved ones with you, it's not like they might have to die themselves just to do that.
The second point I'd like to make is that just by mentioning the military and alluding to dishonoring it, you get all the right-wing patriotic butt-tards to come crawling out of the walls and chew your head off for merely speaking your mind. Which is something you have the right to do, but again it's not a very wise decision to be making.
You have every right, depending on your country, to say whatever it is that you feel like saying. Just remember when there was a time you would be hanged or burnt at the stake for saying or doing things that were deemed "against the leadership" or "Unnatural". While thankfully we don't live in a world like that anymore, its still something that you should practice. Because its all for The Greater Good.