There's a broad community of fish people at all levels of education and experience. What they share is commitment and curiosity. We try things. many of which work. We adjust and adapt when they don't. Sometimes, we even listen to each other. We don't have rigid systems, be it no water changes or massive water changes alone, out of context. You learn to look at the fish species you like, learn how they live in nature, listen to a wide range of hobbyist experience and come up with the most respectful (of their natural needs) system you can.
If your fish comes from flowing water, make the tank water move. If it doesn't don't. If it is from ultra soft, lower pH extreme habitats, try to meet its needs. I'd hold up the idea of evolutionary fishkeeping, in opposition to balanced aquariums. The aquarium is just a glass box you purchase - it can be run in many ways, and it isn't my focus. You purchase the fish too, but it has such a story, and so many elements have worked on its natural history. That can be some reading and digging online, and if you don't like studying a bit, buy into a system. Someone will sell you one.
I'm sure somewhere out there there's a guy named Joe Fish who joined the priesthood and is ticked at this other Father Fish dude hijacking his title.
I try to beware of dogmas, people who say they are experts, and those who get angry when countered. I used to debate online with some of the balanced aquarium people, and most didn't like the fact I had grown up in the balanced aquarium view, as a member of an old school 3 generation fishkeeping family. No believer likes an apostate! But what struck me is that if you offered four or five thought out questions, they would only try to answer the questions that fit their view. If your question wasn't covered by their system, it didn't exist.
That, to me, is a bad sign.
I will soon have had aquariums and fish for 58 years. I've seen some fads. I've fallen for a few. I've met some experts - the ones who made the fish we love the subject of their trained study. When I talk with Ichthyologists, whose training is grounded in the scientific method, I get a different level of intensity compared to my friends who, like me, have studied fish but have done other things to make a living.
The only fish videos I watch on youtube with any regularity are ones shot in nature, ideally underwater. Nature is the teacher that keeps this fun.