When talking about discrete things, 0 has a specific meaning: it is the absence of things. It does not make sense to count the 'first' element as the 0th. When you encounter the 'first' element, how many elements do you have? 1.
This is of course different for continuous quantities. When counting seconds, for example, we should absolutely start from 0.
This is of course different for continuous quantities. When counting seconds, for example, we should absolutely start from 0.