For some further clarification, vaping as in dabbing is fine. Vaping dispensary carts or black market carts are breeding grounds because of carrier liquids and particle size if exposed. That was what he was advising against.
As far as flowers, he is just saying for now, smoking it is safer than vaping it because of the higher temperature as we still don't know at what temperatures the virus can truly withstand as previous tests of 1 hour at around 150F, some strains of COVID-19 survive while others don't, so for now it would just be a potential precautionary method if you are smoking flower that you did not grow yourself, such as from a dispensary, a collective, or the black market.
I vape anywhere between 390F and 420F which SHOULD kill COVID-19, and I will continue to vape and smoke, but his warning does make sense, as we have been lied to worldwide regarding COVID-19 and new information keeps coming out each day, numbers keep rising, and what they told us were facts turns out to not be facts, so I guess he's just saying it's better to be safe than sorry.
Luckily no one breathes on my weed so I don't have to worry about getting COVID-19 from smoking or vaping, but everyone is at risk to get infected, and obviously, no matter how many precautions we take, we can still get COVID-19.
I see a lot of people are ordering food now. Uber Eats and what not are making a lot of money. Meanwhile their drivers are going literally everywhere, with nothing but a futile mask. There are so many potential ways to get it, but that's not the point.
The point is, to keep Steve in your thoughts, prayers, positive energy, vibes, etc... etc... for a complete recovery, and to stay safe.