Did you really think prohibitions for health reasons were about love and care for you? They don't even know you.
I guess this one of the ways capitalism produces evils.
"You make money for the both at a relatively low cost, and they want to tap you as long as possible."
The flaw in your logic is that the smoking employee will generally live to retirement, then will become very expensive for the employer with no productivity. This is the same as the non-smoking employee. The difference is that, per the touted costs by many nannystaters, the smoking retiree will die sooner in their non-productive years. Therefore, resulting in a savings to the business/industry.