Because there is already a very active thread on HGG with dedicated modders that created a version far superior to the vanilla blogpost download in every way. The irony being that Freecities is one of the most fleshed out, well made trainer games, but still will never have it's own thread on the 'Trainer' General because the HGG modders have it covered.
People come to HTG so they can get their fill of low quality, garbage tier, .0000000001v western 3D patreon shill games because this board owner is ridiculously stubborn with his "hands off" approach to moderation. Allowing the catalog to get flooded with threads such as "I found this .0000001v game yesterday, it has absolutely no content but it's really well made! I'm totally not the dev I swear but here's the link patreon.shill/$$$$".