It does, but there are so many versions of “the truth” on the internet, and so many subtle variations that aren’t always obvious to newer fish keepers. I spent weeks researching before getting a Betta, but somehow I didn’t find anything about water softness. It may well have been out there but it didn’t mean anything to me. And then you get member on here saying things like, “they like the same water but those two types may be aggressive together...”. I like the hybrid method, do my reading and try to get my thinking sorted, and then double check with those that know ?I prefer to search different careguides and forums and make an opinion based on that, then see what works and what doesn't work as much as i can.
Also looking at how and where fish live in natire helps a lot