Nothing wrong with those devices. They work well.
You might like to read up on Zwave or Zigbee devices and decide if you’re up for a mix of them or stick to one.
See here Z-Wave vs Zigbee
In addition, there are numerous stable community developed integrations. Before buying anything check the list or search the forum for the device to see if there is an integration.
I think I started with contact sensors because MSO always left the house with the back door or a window open.
We’d both get an sms that something was left open.
Depends on what one is trying to achieve. Hubitat can do a lot of things, automating the lights is just one of them, and everyone's priorities are different.