Can we get some clarification on HUBs and Channels?

So this is my very first time building a pc and I want to do the RGB right, without any unnecessary expenses. I’ve searched these forums far and wide and watched the video about controllers about 5 times now as well as the other videos and I still can’t get clarity on my confusion.

HUBs are described as “cloning the same RGB effect to every component that’s connected to it.” But what if the HUB connects to a supported motherboard header or controller? Couldn’t you control all LED’s separately through one channel as long as the combined LED count stays under the max for the channel? For example, isn’t this the same thing as daisy chaining multiple fans into one controller port or one supported motherboard header? I’m assuming this is what’s happening in the videos where you add multiple fans to one controller channel, which lead me to more questions about channels.

Why do most controllers have a channel for each port? I was at first under the impression you can only control 1 component per channel but if you can daisy chain or HUB multiple devices to a channel, why isn’t every controller like the Corsair Commander where it’s just 1 channel with a huge LED count that can control multiple components?

I guess all of this is to say it seemed like in the guides you were wasting a ton of LED space (and money) not using a HUB or splitter to connect multiple components to unused ports or headers which probably could’ve saved you from buying a whole other controller. In theory I’d want to connect all of my RGB stuff to one, big, cheap, HUB and just connect that to a Nollie1 (1 port 1 channel controller with a 630 LED max), saving tons of hassle and money on these expensive controllers. Sorry for how long this is but it’s pretty interesting to me and like I said, this is my very first time building a pc.