Many do in fact. Not because it's an easier to use platform or has better automation. It does not.
I personally don't use dashboards at all. I'm an Apple Home user and it's the best kind of "dashboard" if you will, for the whole family. I use Home Assistant as a bridge device, as do many others, to bring in those device types that are not compatible with Hubitat, but may in fact be compatible with Home Assistant. However HA automation is no where near as capable as Hubitat Rule Machine without getting into some very complex YAML code. Whereas HE Rule Machine is pretty easy to learn and use.
There used to be an integration called Google Home Assistant Relay, but I've not run it in a long time. No need anymore, and my understanding is that most that have tried to get the newer versions of it working have not been successful. It's essentially another layer, which you mentioned you don't want. It's pretty dumb that Google never allowed you to trigger a virtual device from Hubitat to run a routine (which is possible with Alexa). So Google Home Assistant Relay was an answer to that.
You might consider running HA on a Raspberry Pi, in a VM or a Docker just for the bridging capability. It's a nice tool to have available, and there's a community integration called Home Assistant Device Bridge that can bring those devices from HA into HE where you can automate them and have realtime status as if they were on any other compatible bridge, such as Hue for example.
Another possible option is to just buy an Alexa device. There's a Deltaco skill available. That would allow you to create routines that you can trigger from Hubitat. It's not ideal because you need two routines for turn the light off and turn the light on, but it would do the job. More difficult to get status via that method and possible to get out of sync. Not an ideal scenario, but workable.
