When I am looking to assign my players treasure, I look at the part of the DMG that tells me what treasure to give out, and it says "here are some treasure parcels," and I give those out.
I could add books, scrolls, and components to the list. That is me going above and beyond the RAW, where I am told, as a DM, to assign treasure based on the parcels.
At the very least, the casual suggestion in the PHB doesn't match the actual text of the DMG -- the actual rules of the game.
You are honestly suggesting that replacing gold in a parcel with ritual components is a houserule? I think I've figured out why rituals don't work for you at all.