Individuals excel when there's absolutely no rule stopping them, but enough to not make others a threat, and groups excel when there's rules to prevent individuals from taking an advantage over the rest, be it not paying their fair share on maintaining society, ignoring costs that society pays as a whole.
Here the idea is that natural gas is a greenwashed technology and that society would be better off moving away from it, so through this ban you'll start the migration away from natural gas. The individual standpoint is that natural gas is probably cheaper, so fuck the planet if that gets you a better price.
Are there other things to change if you care about the planet? Sure, but that's not the point and doing only one of them isn't going to make a dent on the upcoming climate catastrophes.