I think if we stay in it long enough we discover that we all go through phases with our horsemanship. I knew absolutely nothing when I started, then in my teens I discovered I knew it all and in my 20's I started thinking I was the best that ever was and then in my 30's I started taking lessons again and in my 40's I found a trainer I love and have used consistently ever since. Now in my 50's I take 3 lessons a week and have at least 1 horse out for training at all times. I've been riding/around horses my whole life and have done the whole show thing and the trail and horse camping thing and discovered Natural Horsemanship and all the super duper fad trainers and I've discovered that everyone is right to a degree. I use a little bit of training from everyone I've ever studied under and I learn new stuff every day. I still trail ride/horse camp, ride in parades, show and play with my pasture puffs. I learn from every horse I put my hands on. I hope I never stop learning and I'm glad I don't know it all anymore, it opened up a whole new world of learning when I figured that out.
When folks ask I'll toss out what I've tried or what sounds like it might work and they're welcome to take what I say or leave it. I've found most free advice to be worth pretty much what you paid for it. Some is golden and some is dross. The trick is telling one from the other.