The WAN show is pretty far down the priority list for them. It's like a legacy product. They still do it for fun and tradition but aren't trying to increase the viewership nor are they investing much resource into it. While it might not seem like much, watching and cutting the show into reasonable clips and uploading to a separately managed channel will consume a decent amount of time that could be better spent working on other videos.
Additionally, I think there is a special vibe with the WAN show as it is. It's got this special behind-the-scenes factor to it. There are a lot of unscripted real Linus moments, upcoming projects updates, secret stuff hints etc. Info that only the real WAN show viewers get to know. That's what I watch for, and it's not something that can be compartmentalized into clips (particularly when the whole show might be one big rant).