Why is the Letter I Always Capitalized?

[Cel-Shaded Deku]

I just don't get it. A and I are the only two letters in the English language that are used as words, but a stand-alone A isn't capitalized while stand-alone I's are. I used to capitalize stand-alone A's because the I rule doesn't make sense unless A follows it too. Maybe there's a good answer there and someone can educate me on this. Why was it decided that I would follow this arbitrary rule and A won't, even though they are similar words?

 

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[Cel-Shaded Deku]

It's always funny when someone does that but it ruins the fun of discussing things with other people.

 

[Dan]

Because It looks bad on it's own. Oh and theirs no I in team AmIrite

 

[Fraxinus]

Because "I" as in referring to oneself is considered a proper noun. Proper nouns are names, and therefore get capitalized.

Not much room for further discussion, so Imma go ahead and close this.