Not necessarily and entirely inaccurate -- just, depending on which source you use, you might end up creating only one type of body if your goal is to do several types or have different poses.
If you're working with Marvel comics from recent times, the anatomy is much better and could do for better references.
But if you're workng with Marvel/DC comics from early times (like 80s/90s) and some of those 2000s "How-To" books, they can be a bit limited on what they teach you.
It's a good start, but you still gotta branch out to other sources.