Why does Culinarian require timed nodes for collectables?

I'm levelling my crafters again, and I rarely craft, but it's been fairly smooth sailing so far.

The lv90 collectables for every other class require nothing but basic materials, I can go out and gather or send retainers to collect, the whole process is nice and smooth.

For some reason, there's a random curveball in Cullinarian in that their lv90 collectables "Rarefied Boiled Alpaca Steak" and "Rarefied Turali Pineapple Ponzecake" require lemonette from timed nodes. I mean this isn't exactly game breaking, but it strikes me as odd oversight that no other class has to wait around for timed nodes to craft any of their basic collectables.