The insight is that 32-bit space is so cheap to exhaustively explore now that you don’t need to resort to possible misses through sampling or spend the effort to make and verify a smart way of sampling. Just brute force the darn thing and be done.
The takeaway might be more: spend time to optimise testing everything, rather than spending time optimising the selection of the subset to test.
Massive caveat of course is that some search spaces are just big, but 32bit space shouldn’t be considered big any more.