they are more worried about muting someone who types something with capital characters instead of making the tournament fun.

wow, that was a pretty cool move man
vs.
WOOAHHHH! FATALITY!

excuse me sir you can not show excitement in this tournament, you have to be as boring as the gm's are. Thank you for your time, here is gladiator left relax trail

Yeah no, this is not true at all.

We say no caps just for the convenience, but in all honesty we don't care if someone uses caps lock here and there to voice their opinion about something. We say "no caps" because if we didn't, 75% of the people would abuse it and start spamming anything because of that rule not being said.