I think you’re once again focusing far too narrowly—foodborne illness, waterborne disease, intermediate animal hosts and parasites, vector borne diseases, fomites, and sexual transmission are all mechanisms that currently spread disease, and it seems very strange to say that we should only ever look at aerosol transmission. Yes, it’s the most worrying, but it’s not enough on its own to address all threats.
Unless you have a reason to think otherwise, those methods of transmission (except for aerosol transmission) don’t seem capable of spreading a contagion rapidly enough to end civilization. This has been discussed in other comments.
I think you’re once again focusing far too narrowly—foodborne illness, waterborne disease, intermediate animal hosts and parasites, vector borne diseases, fomites, and sexual transmission are all mechanisms that currently spread disease, and it seems very strange to say that we should only ever look at aerosol transmission. Yes, it’s the most worrying, but it’s not enough on its own to address all threats.
Unless you have a reason to think otherwise, those methods of transmission (except for aerosol transmission) don’t seem capable of spreading a contagion rapidly enough to end civilization. This has been discussed in other comments.