But economists are clearly not doctors. People with heart conditions, breathing conditions, even anxiety conditions are physiologically incapable of safely wearing a face covering, and to not permit reasonable adjustments for these disabilities is unlawful. Mandatory face coverings in public will never, ever happen.
The regulations re face coverings on public transport are not wishy washy - they are in fact very simple. The problem is people have not taken the brief moment required to read and understand them, instead preferring to spend that time to either recoil in feigned terror, or stick their noses in where it's not wanted.