true
Decline of the tactics...Please read and comment.

Tactics.If u have a solid opening but dont have tactics then that opening is worthless once u venture off the main lines. Try winning a game with only opening theories and no tactics,ohh right u cant.hope my opinion helped

How the heck do you even have a solid opening that is devoid of tactics? That makes no sense.
If you have tactics but no idea how to open a game, you may never get the chance to do more than witness your opponent's tactics as you get shredded. Having one part of chess without the otherS makes for bad chess.
You can't forget about positional play and planning though.