I may of come off a little to brash there. Using Etcher / Rufus is the go to for creating boot media for the Raspberry Pi, which isn't as easy to use as Unraid I will admit - despite the number guides saying otherwise - that its become more mainstream now more than ever.
I may be biased as on my last install the USB installer didn't work, so did it via the manual method...
Personally, having to use a 3rd party tool vs using an inbuilt is so minor these days, that its a "nice to have" but not an essential.