As Minecraft already has the blocks of quarts, it seems like it needs to have the quarts walls to make building and other things look nicer. I think this should be in the new 1.17 update coming sometime in the future. Thank you
White walls would be nice, doing it with just wool blocks is a potential eyesore, and very inefficient on space, like with quartz blocks.
So I do agree that we should have a quartz wall material as a "partitioning board" so to speak, so it can be used to separate rooms without hogging up too much area causing us to make buildings larger than we have to.
There's a whole bunch of nonsense that has persisted in this game for so long for heck knows why,
we can't even place redstone underneath half slabs unless there is a full block of air space beneath.
At least stone and brick walls don't have holes anymore.