Your parent's explicit usecase is "sometimes people make ad-hoc plans with me through messenger", and ignoring those for weeks on end sort of defeats the purpose and encourages those folks to not make plans with them...
That is the issue. I'd be more willing to try training my friends to contact me through other means except that, having recently moved to a new city where I knew no one, none of the people I currently spend time with IRL actually have much invested yet in being my friend, so tossing up hurdles seems unwise.
