Lots of users (especially in the US) do the things you don't do. They use iCloud, talk on the phone, and use Keychain and iMessage. They use Safari on both platforms and the features that let you send stuff back and forth easily. If they have an iPad some even use Sidecar which lets you use the iPad from your Mac.
Oh yeah, I use SideCar all the time but that's not an iPhone feature. And I get that people in the US use iMessage a lot but I don't see the value proposition of an iPhone if most of your contacts use Androids, even if you've gone fully Apple. Safari integration is nothing special (heck, Brave can do almost the same syncing without an account), OneDrive and Google Photos do just as good of a job as iCloud in my experience, and there are so many better alternatives to Keychain. The only truly handy integration between my MacBook and iPhone is being able to automatically switch which device my Airpods are connected to but even that is sometimes buggy.