This is why coaches tell their students to open up the position and play tactically against stronger opponents, as opposed to trying to play positionally and getting crushed by sheer experience.
That sentence kinda doesn't make sense.
Coaches recommend seeking out stronger opponents because you will learn more from their play than you will from one of equal or lower rating.
Coaches recommend playing for open positions because its easier to hang material or lose to simple tactical shots than it is in closed positions; the idea is to encourage you to learn elementary tactics and the importance of safety through experience and post-game analysis.
I think you are mixing two ideas together to make a soup that doesn't quite smell right.
My rating would be far below 1300, but I can say for sure that tactical vision and calculating ability are far from being the main differences. If a lower rated player like myself were trying to improve, the only thing we would ever do is hone our tactics until we were on par with higher rated players. Our real problem is not being able to recognize the importance of positional play. This is why coaches tell their students to open up the position and play tactically against stronger opponents, as opposed to trying to play positionally and getting crushed by sheer experience.