You hit the problem when it comes to lining up two clips and instead of being able to position one and scrub the other back in the timeline you have to fumble each individually and set down markers. It’s like editing one handed.
Also just because you’ve conditioned yourself to work around this limitation doesn’t excuse the developers from not implementing a feature even iMovie has.
Like why can the preview not just represent what’s under the play head all the time, why does it have to wait for me to stop dragging…