Asking about Y (or Z, or some other problem a few layers down) is common when yak shaving. Aka doing the thing that's needed to do the thing that's needed to do X. Not to be confused with the also-present problem of ADHD sequential distraction by some other unrelated problem (possibly one sighted along the way to eventually get X done).

It's a gross idealization that every problem can be directly solved, or is "shovel ready." In my world there are often oodles of blockers, dependencies, and preparations that have to be put in place to even start to solve X. Asking about Y and Z along the way? Par for the course.