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"They'll get over it" isn't a justification for banning something (or for introducing any legislation for that matter). We shouldn't use it against others because we don't ever want it used against us. The whole point of Dunt's piece is that there is a liberal principle that we should apply to any such suggestion i.e. that we should be free to do what we like if it doesn't cause harm to others.
Banning smoking is a quick win for the NHS and people lives in general. As was said up thread. Smokers will be annoyed and then they’ll get over it and start being annoyed at something else.