It is both true and practically useful advice... what's negative about that?
Speaking from years of experience (and as someone whose day job is Android app development) for every Android phone that has high quality developer support for 3rd party OS builds in the custom build "scene" there are dozens with really crappy half-ass amateur hour "support", and this tends to happen more on the phones that most non-hacker-types want to mod (because their carrier/vendor has stuck them on an old version of the OS for no good technical reason, etc).
If you aren't on the latest flagship phone from a big vendor or on a Nexus device, you probably shouldn't bother with custom builds unless you are prepared to deal with a lot of random issues.
Speaking from years of experience (and as someone whose day job is Android app development) for every Android phone that has high quality developer support for 3rd party OS builds in the custom build "scene" there are dozens with really crappy half-ass amateur hour "support", and this tends to happen more on the phones that most non-hacker-types want to mod (because their carrier/vendor has stuck them on an old version of the OS for no good technical reason, etc).
If you aren't on the latest flagship phone from a big vendor or on a Nexus device, you probably shouldn't bother with custom builds unless you are prepared to deal with a lot of random issues.