A lot of people don't get this. First, you are absolutely correct, bullseye is so demanding on your fundamentals that any mistake will *devastate* your scores. I used to have a trigger jerk on the 45. Two-handed at under 20 yards, it wasn't noticeable at all, I was pretty much dead on shooting small groups. When I went out to 25 yards with the rapid fire standard bullseye target, I was quickly humbled. I hit the dang target frame low left so many times with my jerking finger. My 22 (a Pardini) has such a good trigger that the heavier required trigger on the 45 and the 1911-single-stage style break was hard for me to learn. But again, this is pure fundamentals. If you can make a hit on a bullseye target at 50 yards one-handed in the black, it greatly increases your confidence that you could place your shots at a shorter distance.
Not only does it increase confidence, but your fundamentals improve in two-handed action shooting. When I began IDPA, I felt like my accuracy was a big advantage over the other newbies, and the fact that I learned to get my shots off in rapid fire and keep the trigger moving. Now obviously at the high level, IDPA and action shooting is its own skill, but as a core discipline to begin with, I cannot emphasize how good bullseye is enough.