Thanks to Ben Franklin, this little bit of congitive dissonance has plagued everyone in electronics for over 200 years. We all know which way electrons really move, and we all talk about it the opposite way, and that's just the way it is.
It does have consequences. The reason domestic analog US telephone lines run between *negative* 48 V and earth ground is because that "conventional flow" idea had not yet caught on when Bell did his thing. He knew electrons moved from the battery - terminal, so that's how he built his phone and we're still stuck with it.
ak