Understood.
You misunderstand. It's literally just writing an image to an SD card and inserting the card into the Raspberry Pi. Takes about 15 minutes or less and you are running Home Assistant. Pretty crazy how simple it is to get going. Now, learning to navigate around HA can take a bit of getting used to, but it's not bad.
The Home Assistant Device Bridge I linked to, is a driver with companion app that was written by a couple of Hubitat Community members. It allows devices that create what Home Assistant calls entities, to be imported into Hubitat. The device then shows up in your HE device list and responds just like a device that is directly joined to Hubitat. This is great when you have devices that are compatible with Home Assistant, but not yet compatible (or may never be compatible for one reason of another) with Hubitat.
Something to consider even if you don't intend to use the Abode hub. But I can almost guarantee that you will spend a lot less time getting the Abode hub locally connected to Hubitat by way of bridging it through Home Assistant, than you'll likely spend trying to get 433MHz sensors bridged to Hubiitat. You need to do what's right for you though.
Best of luck with whatever path you choose. 