You are completely correct.
I remember vaguely a story about a master (probably international) giving exhibition matches in Russia. He went to one of his other master friends and said something about him being really worried, all the players were doing very well. The friend said not to worry, as soon as the players get out of the opening phase, they will be clueless. And surprise surprise, they all lost quickly after they ran out of book moves!
The moral of the story is simple. Sure, you can learn hundreds of opening lines to perfection. But why would you want to? Just learn the principles, maybe one or two of your favourite lines, and move on to more important areas, like your middlegame plan.
It will get you much further.
Hola,
I've been playing chess for about 18 months now and I never even think about learning openings. I just play what feels appropriate. It's all based on the opponents moves. Im rated a 1520 on chess.com. i dont know if thats good but i see alot more people rated lower than higher than me. maybe many of you need to leave the openings alone and just play the game.
Get your bishops and horses out there in the center and you'll be fine : )
Just my thoughts,
-Sensuinaga