It is appropriate because he Faithful & Discreet Slave, entrusted with feeding us has produced these teaching aids and instructed us to use them.
There is a fine line between "cantankerous" and out right apostasy with this line of questioning. Obviously you haven't been to Bolivia lately, because now many of these "poorest children" have cell phones and cheap Chinese-made tablets are readily available.
Your post is extremely insulting to the many thousands of "need-greaters" who have left home and family to serve in foreign lands. I've never seen any Witnesses posing as a "high tech rich person" wandering the earth to show cartoons. So how about just sticking to posting the photos and keep your old cantankerous, out-dated and erroneous opinions to yourself.