Is Lee Do eventually heading for a downfall?

I am someone who enjoyed watching "I'm a Solo but I Want to Date"
So I have been following each of the participants with interest,
but Lee Do's recent situation isn't looking very good.
As an instructor, shouldn't lectures be the top priority?
And if the reason he can't lecture is due to health issues, why did he appear in videos eating cookies or on "The Devil's Plan"?
I recall that in the past, he couldn't finish his CSAT lectures due to health reasons as well, so seeing this happen again makes me feel both sorry and pity for him.
I wonder if he didn't realize what kind of consequences a single moment's choice could lead to...