I never said tobacco smoke "cures" asthma.
In my sister's case, it stopped the onset.
As with many things, interrupting the onset mitigates a full-blown problem.
The evidence is anecdotal - less smoking, more childhood asthma.
Draw your own conclusions.
I have drawn my own conclusions, your sister did not have asthma.
Draw your own conclusions.
The evidence is documented - more smoking, more early deaths.
Draw your own conclusions.