It's been obvious for those who've gone through all their comments over the years that they're not avid fans and readers as we are.
Most of their knowledge is clearly colored solely by singular iterations like the tv show and live-action films.
Even if comics were consumed, depending on what they've read it wouldn't necessarily be obvious how different certain iterations are.
DeVito's Penguin is highly unique, but to an uninitiated reader going through TLH for the first time, Sale's monstrous rendition would probably lead them to believe it's the same take.
We shouldn't expect people who didn't really grow up into fandom to suddenly jump head first and stay in it. To be really ingrained into the culture and the lore, it takes significant amount of personal time. That would take a dramatic shift in lifestyle.