'Aerosols' are not banned from any workplaces or schools because that would be impossible (except for the type of hyperclean factories used to produce things like computer chips where employees are in hermetically sealed suits with their own, separate air supply)
Aerosol spray cans might be banned in some workplaces and schools and fair enough, the propellants are a known health risk to inhale and by design, they distribute the contents widely and indiscriminately.
Have you maybe read the word 'aerosol' somewhere in relation to vaping and assumed it means the same as an aerosol spray can?
An 'aerosol' is simply when very small droplets or particles of anything, get suspended in air.
Perfumes do produce aerosols when they are sprayed. It doesn't all land instantly and neatly as large drops of liquid on the skin.
The steam from kettles is also an aerosol and so is the steam rising from a hot drink or meal. Fog is an aerosol, so is smoke, so is dust, so are the products of coughing, sneezing, sighing, breathing or scratching an itch on bare skin.
The important thing when it comes to health risks from aerosols is what the droplets or particles are made of, in the case of solid particles how small they are, and how long they stay in the air.
Vaping produces an aerosol of liquid particles, almost entirely water and glycerine, with a small amount of flavouring. It drops out of the air very quickly because glycerine is quite heavy (and is one of the least allergenic substances on the planet) and the flavourings are the same as those used in many food and drink products. I'd say the risk of catching a whiff of a colleagues vape is about the same risk as getting a whiff of steam from their freshly microwaved instant porridge pot or similar.
Here is where the law currently stands regarding reasonable adjustments for people with severe allergies to perfumes and aerosols:
www.rwkgoodman.com/info-hub/clearing-air-aerosols-perfume-workplace/
I agree with the article, I'm surprised it was not practicable to ban the use of spray perfumes and aerosol cans at employees workstations, but banning them altogether, even in the toilets, would have always been difficult.