Being,
No, not exactly. It is not about any one thing in particular actually. It has some philosophy about being as fit as a human being is possible, and they have defined 'fitness' as a list of 10 qualities, strength and power just being one of them.
Crossfit is NOT a solution for anyone who only wants to focus on any one or two of these 10 qualities, such as someone who wants to focus on hypertrophy or strength.
I think the occasional WOD (once a week) is a good supplementation to any specific program, such as HST for hypertrophy.
Also, if you are not obsessed with the one quality you are focusing on, you could do it the other way around---crossfit could be your core program and supplement it with an HST day a week.
Of course, if you become a Crossfit believer and just do that, you will still slowly get bigger or stronger... and faster, more flexible, more accurate, have better recovery abilities, have more endurance, run longer, etc. etc.
Alot of guys who just want to be Crossfitters realize quickly that they just don't have the basic strength to really keep up, so they do a 3-month run of SS and then go back to just being a crossfitter.