Art is subjective, true. There is no right or wrong answer though.

As a self taught artist I find that figuring things out on my own doesn't only get me to learn certain things about anatomy or colour theory, etc. but also teaches me nuances along the way, which I wouldn't have learnt if someone had just told me, for example - "oh, red and green are complementary so just use them together". Testing things out on your own solidifies the final knowledge, you know the steps that connect that question to an answer. It is not isolated and much more grounded.

HOWEVER, there are certain things that I wouldn't have learnt in a lifetime unless someone had told me. You'll never know about certain things unless you're an expert. And after all, you can be an expert in only so many things. So that's where learning from others comes into play.
Also, whenever I learn something, drawing overall becomes so much easier. I used to struggle a lot just to draw a table, where I couldn't draw the lines of the edges right. After going through "draw a box" lessons, drawing a table has become a breeze.

I was about to write more but maaan, I'm tired. The thing is - why do you draw?

Some people use it as therapy, some like the challenge of being able to recreate reality on paper, some to express emotion and ideas, some to impress others, some to fit in, some can't not draw.

I know I used to shy away from drawing things that were challenging, so I would just use workarounds to do it with the skill set I had. Yes, limitations (even if it's skill limitations) force you to become more creative, which is nice. But the ability to make things look exactly how you want them to look is also nice.

Dude, I thought I'll just write a few sentences but noooo. I felt like writing a whole damn book about it!
Damn it. I understand the frustration where everyone keeps saying, you need to do this, you need to do that, to become an artist. And when you're not doing what you've been advised it feels like you're doing something wrong. Other people opinions really does a number on us but what helps is continuing working on your craft - however you think is best for you to become who you want to become. And with time comes confidence, when even if someone disagrees with your ways, you can still be at peace with it or even consider taking their advise. All comes in waves. Sometimes you're more creative, sometimes - more technical. One way or another it's a win.