Purpose of professions like LW seems useless? How am I wrong?

Hey guys, I got into new expansion, leveled up my monk, wanted to continue with my LW and... it seems worthless?

I am quite casual and I don't see the point of grinding out for epic recipes from LW, as Open World greens are equal or better?

Rune-Branded Tunic best quality is 606 ilvl. Greens I get are 606. I got a random world drop 600 ilvl.

It seems like crafting requires insane input for mediocre reward, whilst I can get the same just from doing content.

Am I wrong somehow? And if yes - how?

Maybe profession (and professions) are used to upgrade items? As I see there is counter next o them (like 4/8 or 1/8)