Capitalization, punctuation, spelling, exist as conventions because writing is a lossy medium, and using them in consistent ways boosts the signal-to-noise ratio.

I wish I could explain to young people with perfect vision that some of the signal loss happens between my screen and my brain, and it’ll happen to them too if they are lucky enough to not die young.

This has been a subtoot but it is also a plea to just find the Shift key.