This is accurate. I've been flashing phones with custom ROMs for years now, and doing it through the browser makes it both dead easy and pretty safe. You no longer need to be a tech shaman to do it. Just follow the instructions and you're good.

Also, if you don't like it, you can always go back to stock Android (i.e. what was installed before you started tinkering). It's pretty painless. So roll up your sleeves and explore!

lineage also recently added something similar actually.

Which only works if you use chrome. What is the overlap between gOS users and chrome users?

Simply having GOS on your phone is meaningless if you don't know how to use it properly.

Removing spyware from the phone of a complete non-techie means that non-technie has a spyware-free phone.

Sure, it won't solve every privacy or security concern, but it outright solves a fuck-ton of privacy and security concerns, regardless of how technical the user is.

I've been handing GrapheneOS phones to young or elderly people in my life for several years, with very good results, compared to leaving them on iOS or stock malwared Android.