WTH doesn't a usb stick with an image install HA on my drive

Long story short, you download an image, use belana etcher to put the image on a usb drive or sd card or whatever can boot from for your intel device, say a nuc for example. Only to find out it will just boot HA. Granted i didn’t ready everything, only to find out i have to boot up with a ubuntu live desktop and do some magic and then burn from linux desktop the image with belana etcher again onto the hard drive. Sure it works, and i know enough to get around all that but i know enough people that know a bit but not that far.

I know it is possible, but perhaps lack of time since it does involve some work or did i just simply miss it? One would need to create a HA image with the option to boot from it and just install it via a simple gui menu. Like old school linux installations. That would work just fine. I know it is impossible to work this out for every hardware/architecture but it would answer the call for the majority.