Know exactly what you mean. I did that once, figuring it was only necessary to pull the left front (closest caliper and has both circuits). Trouble is, I rarely have a helper. I had to slip in a worn pad, as I'd just put new ones in, so I only did the outer. Pried the pistons in and then stood up to see what I'd done.

Didn't see any bubbles breaking the surface but I did see I'd underestimated what volume was behind those two pistons moving 3/8 of an inch, the pretty amber fluid with streaks of brown brimming over the top of the rez. Reminded me of a port-a-pot in need of service.

Yes, good theory, but I decided it wasn't necessary after that. Hard pedal is the final judgment. If it doesn't happen, then bleed the wheels at risk of broken bleeder. This does not occur with a "well maintained brake system" but then again, neither do master replacements. :)
--
Art Benstein near Baltimore

When everything's coming your way, you're in the wrong lane.