Sb, you made a very good point about people on public transport, keep fiddling with their mask, hence, hands and fingers that have been touching things in public, now being put on their mask and face.
In a way, this procedure may very well help transmit germs, that otherwise may not have been.
Tough situation indeed.
Footnote - My wife works in a chemist and she made that very comment today when she arrived home.
People not wearing their masks correctly and fiddling with them whilst touching stuff is very evident, but it isn't a reason for the majority to not wear one imo.