Poor Marie and other very creative artists like her have been getting this garbage for so long. It's only mildly funny and reasonably insulting.
I'm not complaining about the comic strip, it's done in reasonably good taste. But it is a very corny and cliché trope.
I'm pretty sure we don't actually think they were on shrooms. I think that Marie is amazingly talented to make this art. I think this more speaks to how our conversation goes when we play the game:
"These pictures are amazing!"
"How do they come up with this stuff?"
"I dunno, must've been high."