tactics is important but you cant totally concentrate on it. like you said, strategy is an important part. evaluating positions, seeing which minor piece is better, how to improve your pieces, and tactics, simply don't lead to the understanding of these. Because if you're playing a game, giving mindless threats hoping for your opponent to not see a tactic, then you're not exactly improving.
Is there such a thing as too much tactics?
Sort:
For players under about 1800-2000 USCF, what is the problem with having 95-99% of their chess training be tactics assuming they are not clueless with other elements to the point where they are losing significant number of games because of it? Isn't this, more or less, the best approach for most players when you factor in things like time that most players have for playing/training and their rating level?