Build Your Own Linux Distro

I think you make a mistake. You are on a level, which is that high and certainly took quite some time to reach, that you forgot your humble beginnings. Seems to be a common trait. Happens to me, too. At first something new is difficult. Curses, when something does not work as expected, can be heard between here and alpha centauri. Finally the problem is understood and it becomes easy. And in a few years the initial problems are forgotten. :-)

Of course, installing LFS won't bring anyone even close to your level, but it is a stepping stone. And not everybody needs to setup his own DNS or email server. A web server and openssh is a nice practice, when done the first time without blindly accepting whatever is pre-defined by the distribution. But maybe LFS is doing all this now. The last time I used it was ~10 years ago.