It's pretty obvious many people cannot be trusted to be responsible with it.
You just have to look at any pathway and you'll see black spots where selfish, simpletons decided it's easier to spit out their gum rather than walk 10 steps to a bin.
We've all had shoes ruined forever by someone's laziness or had our car or home carpets ruined.
It can cost one council $200,000 a year to clean up gum mess. And we have over 500 councils in Australia.
Singapore has had gum banned for decades and they don't complain about not being able to pay for a piece of plastic with flavour that lasts 30 seconds.
Maybe we can have a discussion about whether we need gum in our lives or if we're better off without it?
Sure and for the op, why don't we ban computer games.
The hardware to run them requires resources and fossil fuels.
They require electricity to run, usually internet resources too.
They detract from productivity, potentially lead to aggression.
There are alternatives.
They are not necessary.