musicians start counting from 1 instead of zero!
Let's not be irrational now. (Was that a pun, I'm not sure.)
It wouldn't make any sense for a musician to start counting at zero, and everyone else doesn't start counting at zero. When you play a note, you've played one note, thus you count: one. When you've played no notes your note count is zero, but you don't start counting until you start playing. When you look at notes on a page, you count the number shown. It's just like counting ducks or such, one two three four. If you're going to play four notes, but you start counting at zero, you either say the first note is zero and only end up counting to three, or you start with zero and count to four, in which time you've actually counted 5 numbers. Neither of those make any sense. There's really no use in differentiating between the beginning and the end of a note when in most music, the time between those two points is so small that it doesn't matter. It would just unnecessarily confuse people. Most things like this originated based on what comes most naturally and logically. Starting at zero comes neither naturally or logically in this case.
But I fail to see how this is related to the use of line and space notes.
