Some twenty odd years ago I shot part time for a studio owner here and for myself using my own gear. I also did a fair bit of freelancing. I probably did some 30+ weddings on film and a multitude of other types of jobs. I never did use 35mm commerically as I had an RB67, Mamiyaa 645 and a Pentax 6X7 of which I still have two of them. As children came along they became my priority along with my fulltime employment. You are right in that the prints that came out of the lab back then were very sharp, even the 35mm stuff that I did shoot personally and the odd job that required 35mm transparency's as a deliverable.
I retired at the end of last year and decided to do photography again and am making a pretty good living at it. I guess in some peoples minds this would call me a pro. I know a couple of other people have other words for me.
Did you ever do your own darkroom work. Do you remember having ever done your prints with your enlarger lens wide open. That is akin to an image right out of the camera. Stop it down and you were sharpening, in a manner of speaking. I almost always used a combination of filters to add contrast, boost a certain color, etc. Again, akin to color balance now. We did doding, burning and alot of other things that we do now in the computer. Even in today's high tech 1 hour photo labs there are adjustments made to your negatives if you have them printed, albeit they are somewhat more automatic. File-revert..well throw the piece of paper you just printed, take out a new one and start over. Now you just go file-revert and start over without getting your hands dirty and it is a whole lot less expensive. In most cases I used to send my film and printing requirements to a pro level lab so you didn't see the time investment in that image but it was there.
There are still times where I will pull out the old film cameras and shoot a job, particularly if the customer wants a very large killer print. I have recently added a 1DsMKII to my body list but I have not tried making any large prints from it but I assume that it is going to make it easier.
I don't disagree that, particularly in the beginning, using a DSLR seems to be alot harder. I've taken a slightly different approach though to make this a little easier. I still spend time in the darkroom, though my enlarger is now a computer. There was post production time before just as there is now, find it easier now and the profit margin is alot better.
I shoot RAW so I expect to have to spend some time on my images in that post production phase. In the odd occasion where I do shoot JPG in order to cut a couple of steps out of post production it took me awhile to get the parameters set where I was happy with them. Now I am and I can get shots straight out of camera that can sometimes be delivered with "as is".
It takes some time to get your shots where you want them out of camera but it can be done. You have to invest the time in the shots to attain that punch and sharpness that someone else was probably doing for you as a pro.
Don't be disheartened but take this as another learning experience in life. It is all part of the process. As always, IMHO.