I am behind you 100% willyslover.
We subscribe to all the tech pubs here at our work. They recommend exactly what you advised...
I admit, back in the 70's and 80's I used to just push those caliper pistons back into the bores, slap in a couple of new pads with the anti-squeal on them, and away we go...
But now, with ABS, the sensors do not like H2O at all! When you have a brake light come on and remain on on your dash, you check all the normal things to no avail, and then when the dealer/repair facility bills you for ABS sensors and a brake fluid flush, you'll either learn or walk with a list to one side after your wallet gets lightened. I did not have that happen to me, but a good friend did after doing what we just talked about. And if someone nicks the dust boot on the caliper with an errant screwdriver, after water and road grit and salt gets in between the piston and bore, there could be quite a dangerous white-knuckle condition on a curvy mountain road or even a flat wet road trying to stop in a straight line with 1 brake inoperable...
I was instructed by a wise old man back when I started working as a heavy equipment mechanic back in the early 70's the following:
Motto: "If you can't find time to do it right the first time, where do you think you are going to find time to fix it?!"
Living up to that has brought me pleasure and quality work throughout my mechanical career...
ALWAYS, ALWAYS, ALWAYS bleed out the old fluid when pushing calipers back into their bores, and if you save an old bottle with a little old fluid in it in your garage or workshop ( cap it off when not using it ) you can put the bleeder hose in that when bleeding the caliper. Unless you pull the piston back out of the bore in the caliper, gravity will help to keep the old fluid from going back into the caliper.
I purchased a pressure bleeder from Snap-On so that I can change the fluid about every 2 to 2-1/2 years. Brake fluid is ethylene glycol which absorbs moisture. Even if I didn't have ABS, allowing water in the fluid to cause rust in the entire system is not good for preventing brake problems down the road.
Good luck!!