>>310493680
Because generally buying shit on the Quest store when you have a PCVR experience available is a bit "eh" for most people, that and the FB bullshit. If you really like rhythm games I could justify buying it twice, once on Steam and once for Quest (for portable/ standalone), but up to you. Not sure about quick play.
Pavlov and Boneworks you will have to get via SteamVR or the Oculus store since they're not available for Quest standalone. I recommend both, but I thought you were asking about standalone titles. Contractors and Pavlov do have Quest betas on SideQuest however, though they're both shit. 
For VD you need to buy it on the Quest store, not on the Steam store. Then you sideload to install the mod that allows wireless vr from SideQuest, and download the "streamer app" on the VD website. Then you're good to go.