Dunno. It depends if you drive unnecessarily, doesn't it?
I'm not bitter about my chronic, incurable illness. It is what it is. There is shoot that has happened during (mis)treatment which I do get a bit grumpy about and there is stuff about research into new treatments and possibly maybe one day a cure which I'm really quite enthusiastic about... but none of that has anything to do with this discussion.
I do get a bit bitter when the selfishness of others causes me additional health problems like asthma, though. Why should leisure motorists be allowed to have completely frivolous and unnecessary drives which means others are not allowed to breathe freely? There's a balance, isn't there? And it's currently very lopsided and people have died as a result of the air pollution.