I have read that players like Ike haxton, sauce, and many other top players in poker have a GTO strategy that they use. Here is my understanding of it, please someone correct me if I am wrong. They have created a strategy for each potential spot, and make balanced plays so that their opponents have a difficult time reading there hand. 

That being said, does this mean it doesn't matter who they play really? They just play their constructed ranges with their balanced moves in each spot regardless of how the villain plays? If this is the case wouldn't this lead to much less variance because now they're close to eliminating potential mistakes, so the only room for variance is within the cards. Maybe they go on a bad stretch of bad beats, or they balance their range in the wrong spot.

 This leads me to believe that a style like this is the best way to play because over time if you are applying the concepts correctly, the worst case scenario is you break even. Is a strategy like this usable at small stakes? Well let me rephrase that, is it more profitable than playing a TAG or LAG style to exploit opponents????

Now here is my last question, where can I learn a balanced strategy? Any book, RIO video, or article recommendations?