Assembly language is actually simple stuff. You just need to read the datasheet. No difficult type systems to deal with. In the old days programming assembly language was nasty because one mistake could mean your computer had to be rebooted and you lost your work. Not anymore.
This is like saying chess is simple stuff because you can learn how the pieces move in five minutes. If all you want is a basic understanding of how things work, that level is ok. If you want to play/program, it is a completely different story. I'd even go so far to say: Why do assembly if your goal is not to be better than the compiler, at least in some respect? Beating the compiler, now tell me that it's simple stu…
Why learn assembly?, well for one, the non-abstract aspect of assembly is less abstract, and arguably easier to understand than even the simplest high level languages. Secondly, learning assembly is also learning how computers work and that paradigm will help you even as you largely work in a high level language.
And beating the compiler isn't as hard as you might think if that becomes necessary some day.