Oh yes. It is legitimate hardcore production engineering.

If you look into it, there's a long history of Lego going the extra mile in every way. And to protect their methods, they do stuff like burying retired manufacturing dies in the foundations of their new facilities to ensure they don't fall into the hands of competitors for reverse engineering.

I think the tolerance on LEGO was about the feature size of a Pentium II or Pentium III last I checked, which is ludicrous considering it's moulded plastic.