Its quite the opposite. What many people dont seem to realise is that
water content in a wall is an equilibrium between water entry and
evaporation. Waterproofing products reduce water entry, but they
reduce water evaporation even more, so the wall gradually ends up
wetter.

Crazy logic. I have a SW facing gable end wall that was permanently damp
until it was sealed 10 years or so ago. Now it doesn't get wet
internally, so it doesn't need to dry. I really don't see the problem.