That's literally my point—someone submitted that definition, 150+ people agreed with it, and no one submitted an alternate of any sort.
I would tend to expect that if OP is right that there's more nuance to Coms and it's not primarily about crime, there would be at least one alternate definition, because, as you note, anyone can make a definition there, and it's emphatically not a site dominated by the HN bubble.
That there is no alternate says that the crime-centric understanding of Coms is the primary one on at least one other site that doesn't match OP's stereotype.
If the word is just a made up newthing, why would there be an alternate definition? You can find 150 people to agree with anything on the internet. It's the most trivial thing in the world to achieve.
What kind of a take is this? UD has the cess but it is also archival and useful. I use it several times a year to do topical writeups for friends about words.
https://www.urbandictionary.com/define.php?term=Com
Maybe Urban Dictionary is also populated by people who misunderstand the community, or maybe you weren't as deep as you thought.