Maybe… just because humans have some weird ideas about language… not every word has only the meaning what someone does mean with it… ( ← and this is really mean 
) and so sometimes people make rules about this…
On the other hand… this also sometimes is… weird…
( and yes i do use a general preconceptions about citizens of the united states here… you can even see the article starts with “Americans” … not including Canadians or “South-Americans”… 
)
And of course all this wouldn’t be necessary when everbody read the Guidelines… but then there also wouldn’t be all this questions about why some new user may not be able to upload more than one image… if they just would have read something about the how to use this forum software… in the FAQ… or maybe had clicked the on the personal message because the discobot 
send them a welcome…
So the main problem… are humans… 
TLDR (?):
This site doesn’t want to get sued… not even want to have problems… nor drama…