"that familiar click is the sound of a carefully engineered interference fit designed to hold firm but still be easy for small hands to pull apart."
My recent experience calls bs on pulling them apart.
Having grown up playing with LEGOs, I can still distinctly remember the feeling of sore fingers pulling tiny pieces apart after a long session. It wasn't until a few years ago I learned there's an official brick separator tool [1]. Would've changed my life as a kid.
[1] https://www.lego.com/en-us/service/help-topics/article/lego-...
The tolerance is definitely more applicable to the getting them apart then putting them together.
I always remember the small, weird pieces being hard to get apart.
What I don't remember was every kit being made up of so many small, weird pieces.