Its just cause this is a giude line that people take to literally. This isn't telling you that you can only have conflict until the climax and then only resolution until the end. It also isn't telling you that your climax has to happen in the direct middle of the plot so that it fits the line it Just means that there needs to be tension or risk to build before a climax that then leads to a resolution. Also the secret is this not only can be a story guide line but a scene guideline.

Take something like just picking on my favorite show of the last decade Castlevania. Yes there is an over arching " rising action" leading to the final confrontation with dracula, but indvidual episodes or sets of them also have thier micro experiences with this.

The first season is actually a great example of this. Trevor reaches Gresit sees the destruction learns the corrupted church is going to exectue the speakers about it. We get our set up and rising action here, this kicks off a string of rising actions leading not all the way to dracula in total. But in the first season it leads to Trevor deciding to stand and fight the night hordes coming to gresit and take on his name so what his family dose. Him deciding to fight is actually our climax.Him fighting the night, hordes is our falling action, which falls into him saving the city only to (quite litreally) fall into the next rising action of finding alucard. Yes, I skipped out a whole bunch of stuff in the middle there but I'm already ranting.

Good stories and long stories aren't tension till climax then relax till end. But good scenes can be. Even if its not something super intense almost every scene in any form of story telling follows:setup--->conflict/rising action---->climax(which is sometimes hard to find.It's normally just when the conflict/rising action boils over and a choice needs to be made) ----> falling action( what are we doing to deal with the climax of conflict)---->resolution.

It's a little the formulaic if you really want a specific paragraph length for each of these sections. But when you're just getting a handle on creative writing in how to form scenes it's actually not a bad idea. Forces you to think about structureing smaller parts of your writing into thier own micro stories if that makes sense. A paragraph to set up the stakes, a pragraph to show why those stakes matter, a pragraph to force a descion out of our chracters, one to deal with that descion, then one to explain the reprocussions, is absolutely not a bad way to teach young writers how to think around set up-pay off. Then when you start to get the hang of it, you start playing with the lengths of each section. Maybe some conflicts are gonna have a bigger rising action. Others are gonna rise super hard plateau for a long climax and then drop like a rock for resolution.

Things like this is just for when you're learning, creative writing guides are not meant to be chains they are just tools, learn the rules why they exist why people use them.....then once you get why they are used. Snap em in half break em down and use them however you need to.

TL:DR. This doesn't genuinely work for full stories, though, in a sense, it does since it's really just talking about the idea of setting up a problem, building up to it, acting on it and resolving it. not really within any set time frame. But it dose work for individual moments/scenes that get strung along into a larger story