Who is saying they can't work on midcore content AND high end raid content at the same time?!
I think that's what you should be asking for. Instead of this false dichotomy as if it's raiders vs non-raiders. What do you think raiders do when they completed the tier, or their clears for the week? They also want more midcore content and some sort of long-term rewarding grind to do.
I know I do. I've been playing for a bit over 3 years and I got through 10 years of content in that time, and now it's just kinda... dull.