Why does:nth-child() in CSS start from 1 instead of 0?

I found the answer footer [1] to be both amusing and an interesting / informative link about ordinal numbers and how they tie in to linguistics [2]:

    (Note: This is not some subjective opinion by me.
    This is literally how ordinal numbers works.)

[1] https://softwareengineering.stackexchange.com/a/314538/52808

[2] https://en.wikipedia.org/wiki/Ordinal_number_%28linguistics%...