FullSail is not a music school but an audio engineering school - huge difference. A music school will have instrumental instruction and theory as the core of its teaching with maybe a side serving of engineering. An audio engineering school on the other hand will be the exact opposite focusing mostly on engineering topics and maybe a side serve of theory and if you are very lucky some instrumental instruction.
That said, going to school to learn how stuff should be done is a pathway for some folks and not for others. In some disciplines you do not even have the option of saying I do not need/want to go to school - you must do it if you wish to be a doctor/lawyer/construction|civil|mechanical engineer/etc.
When it comes to music, you need to find the school that caters to your needs: this does not mean that you should reject a school if it does not exclusively focus on what you want to learn, as the programs are usually well thought out and interlinked so that your learning is maximised.
If you go to a school where the response to any question is "go with what you feel" then I highly doubt that you will learn anything and and doubt that the instructors know much - however, we need to remember that the we are getting thee reports through a lens that may well distort the information transmitted due to other biases.
I had it said to me early in my learning "One man's great sound is another man's distortion", highlighting that depending on what you know about the craft means that you may not recognise some issues in your work until much later. Put more bluntly: what you know will determine what you think about the quality of the work around you - if you don't know sh1t or have never heard a great mix then you won't be able to produce one yourself.
Going to school to learn these things - what a great mix sounds like, how to achieve it without accidental distortion, etc - should be considered a must. For this reason, more than any other, shopping around a little may be in order so that you find the best possible program and teachers - quality costs, as Steve Jobs used to say......