For inexperienced players, missing tactical variations is far more common and game decisive than amongst stronger seasoned players. However, when listening to interviews and analysis gathered amongst experienced and stronger players, the tactics are often pointed out in a very relaxed way. This is of course because seasoned players recognize the tactical elements straightforward.
The bulk of the annotations, and analysis are to scrutinize the positional points that may lend to tactical possibilities. This is because at higher levels of play, strategic blunders have a far greater impact in the grand scheme since the advantageous position leads to more opportunities for tactical combinations.
Tactics are much easier to learn since forced moves are straight-forward when you work them out. Strategical elements are not as easily quantified by routine, but more of ingenuity and experience.
Hopefully, this article will help you with making decisions on how to study. Keep practicing and most importantly, have fun :)