The numbers are irrelevant for counting time though. It could just as well be A B C D rather than 1 2 3 4. In fact, tabla drummers use words/syllables instead of "counting". Counting measures is completely different as in that case, you're actually measuring something. Counting time is more declarative than measuring imo. Especially when you consider notes between the beats. It's not 1.75, its one-e-and. It's not 2.5, it's 2-and.