There are different levels of music theory depending on your goals as a musician.
Be Balanced In Every Genre and Style
If you want to play Blues then you wouldn’t have to learn advanced counterpoints or if you want to play in a Classic Rock band then you don’t need to learn advanced jazz harmony. We will say if you do know these things, it does aid in whatever genre of music you are doing.
You may not think learning jazz will make you a better worship musician, but with music theory you will lightly utilize many tactics in all genres.
Become A More Proficient Learner
Every musician who learns music theory will find it easier to play the music that they want to play – even with at least a small grasp.
For instance, with basic diatonic harmony (which any hobbyist would need to know), you can get a grasp on music theory in less than a year. However, it will take a while longer than that if you want to be a professional,
Korey Hicks started learning music theory at age 16 and was fairly competent in it by the age of 24 to the point where he could play almost anything he wanted to play.
Yes, you have three to four years in school, but then after you graduate is when you actually solidify what you’ve learned and allow you to use it with real-world examples.