Customizable pronouns (he/she/they/custom), gender fluidity allowing Sims to switch identities freely, body type selections replacing strict male/female binaries, and sliders for sexual orientations (gay, bi, pan, ace, aro) dominate the Create-A-Sim process, forcing players to engage with contemporary gender and sexuality concepts every time they build a household. NPCs default to diverse identities including trans, non-binary, and LGBTQ+ pairings, which anti-DEI mods specifically target by race/gender/sexuality-swapping them to white/cis/straight—prompting EA to issue takedowns, underscoring the studio's commitment to these elements.

Maxis explicitly states inclusivity as a core value, partnering with GLAAD, It Gets Better Project, and brands like Dark & Lovely for 'representation' in hair/skin, framing the game as a tool to 'shape kinder, more empathetic people' through self-discovery and correcting 'historical exclusions.' Recent expansions like Lovestruck amplify this with polyamory and relationship language neutered of traditional terms. These intrusions prioritize activist-driven identity normalization over seamless escapism, compromising the sandbox fantasy by injecting real-world social justice mandates into every interaction, even as the game's monetization draws more ire than the ideology itself.