I wouldn't discard that is clearly a smokescreen to give journalists something to write about. It was in the same day as the embarrassing psychological mark of 50.000 US citizens killed were reached (if I'm not wrong)... and everybody is talking about bleach-yes / bleach-not.
If the real purpose was that, it was clearly effective. Mission acomplished; journalists confused and running in circles; lets move on.
The other possibility is that Trump would not be aware that UV rays cause skin cancer, so would cause lung cancer really fast. Seems unlikely to me. Not to mention that skin has melanin. Human lungs are like a norwegian albino in Torrevieja standing in the middle of the street at 15h. No; Trump most probably knows yet that the sunlight can hurt.
I assume also that trump knows yet that bleach burns human mucous tissues. I would have a hard time thinking the opposite.
In terms of deathcount, Coronavirus is turning quickly in another Vietnam for US, when 58k US soldiers were killed.
And is being much worse for Europe (all should be said). We are not laughing about it. Trust me.