The thing with second hand smoke is your senses can warn you of this danger before it's a threat.
You can often see someone smoking before you can smell the smoke. You can also smell the smoke if you happen to not see them and then choose to react to the situation. You can either continue inhaling that smoke or walk about 30 feet in any direction away from the source to put yourself out of danger.
But with this virus, you don't have such luxuries. It's invisible, tasteless, odorless and can kill you after being exposed to it once. That's pretty much as scary as it gets.
you need to be exposed to second hand smoke for long periods of time before it can kill you, the covid-19 exposure take considerably less time in comparison, then again are they really comparable at this point?