The Sims 4 doesn't care about giving players the ability to edit special lots.
In TS3 there wasn't a single lot you couldn't edit yourself. Festival lots, tombs, highrises, etc. Even lots that were locked, there was an easy cheat to unlock them. Developers also provided the tools to create your own triggers in EPs like World Adventures, and multiple markers that trigger special scripts or events, as well as extras like the fog emitter which allows to generate any FX in the game.
Sadly, The Sims 4 has a completely different design philosophy. It is not about making our own stories in a sandbox experience, but about playing the stories developers want to tell. StrangerVille is the most obvious about it, but all EPs and GPs except for Seasons, Parenthood, Vampires and maybe Pets have this problem.
