Why are long challenges only rated for Div 3?

I’m pretty new to codechef and yesterday I stumbled upon this blog
saying that long challenges will only be rated for DIV 3.

Here’s the thing :

In short, every month from 2022 onwards, we will have two separate long contests, rated for Division 3 coders – Long Challenge 1 and Long Challenge 2.

What about Div2 and Div1?

I’m happy about Div3 users but Codechef should also do something for Div2 and Div1.

Thanks in advance for replying!

You might want to read this.