The 30% cut was industry standard for digital distribution for years. Google, Apple, and numerous other players all took 30% as standard.
That being said, Steam hasn’t taken a flat 30% for years now - their standard agreement starts at 30%, decreases to 25% after the first $10m in sales, then decreases further to 20% after $50m.
Furthermore, Valve has done more in terms of providing services, APIs/libraries, and end-user features (all with no additional fee to the developers or consumers) than any other game storefront has. I’d say they more than justify their cut.
LiDAR in particular actually kinda sucks at those conditions (basically any form of precipitation). It’s really only good in clear environments.