Telegram and WhatsApp

Hi Guys,

to reply a message directly you can swipe - and to swipe you have two (2) directions on a smartphone.
left and right. so thats easy

so why isn't there a worldwide rule to swipe to the left side for good things?

like the behaviour in the Telegram Messanger App
why is it in WhatsApp Messanger App to the right side?

switching between this apps can be annoying.

can we build worldwide development rules?
if you do not have WhatsApp or Telegram, i recommend you to try this function

cheers
Tom