Everything takes time, not just skill in the arts. However, it is possible to be more efficient with your time, or to do more in less time, by working harder. Just like covering the distance of a mile, you can walk or you can run. If you run the mile you will reach your destination sooner. Running is not a shortcut. A shortcut would be doing something to make it easier. Running the mile is not easier, in fact its harder than walking it. But it will get you there sooner. So that's the tradeoff, you save time but you have to work harder.
It's not always possible to be more efficient. No matter how efficient, some things just take time to learn and understand. Let me use painting as an analogy. You can use a sprayer, a roller, brushes, or cotton swabs to apply paint to a wall. A sprayer is much more efficient than a cotton swab... but you're still going to have to wait for the paint to dry in between coats -- and that time isn't going to change, no matter how efficiently you applied the paint to the wall. I can teach you combative skills to a good level of proficiency in a matter of weeks. But to understand the principles underneath them, and to be able to go beyond the direct techniques -- that's going to take a lot longer. And if you focus too hard on the wrong parts -- you'll never get that understanding.