It's not about the moe
In fact it's quite the inverse. The rope I've mentioned is the one who supports moeshit. Japanese people want the flat character to stay "pure" so they never give us a peak of anything. While the character who is always showing something only shows a few more. It's entirely pointless.
So the episode will go like this>Huge Tits will enter at the beach>Zoom on her >Genki sportsgirl will suffer from breast envy, while using a simple swimsuit >Shy girl will laugh at distance, while making a picnic, with shirts and shorts on
It's bullshit, I'm telling you