I think they expect that you will dry the chain quickly with shop air or in the hot sun.
An alternative drying method would be to put the chain in a bottle of meths & shake around; all alcohols will tend to bind with water & you can reuse the meths several times.
I don't use this approach myself because for $2 per aerosol I can buy solvent based degreaser, one can will effectively allow me to clean the chain & all gears.
I try to be careful to avoid contact with the tyres & collect most of the solvent that drips off. Some I reuse applying with a small paintbrush to stubborn areas.