The point he was trying to make is that people that eat McDonald's every day are unhealthy, and sure, the alcoholism on top of it made everything worse, but do we really think that MCD's is the only bad choice those people are making?

Like someone willing to eat a shitload of fast food (not for a movie) also is likely to have alcohol or substance use disorders, or eat unhealthy amounts of sugar, or not exercise.

I think a fair point was made regardless of the shenanigans.