I think this is the only thing steam is good for. A means to rollout patches to all gamers with ease. All the rest of its features are a waste of time.
That's your opinion & you are welcome to it, but as a father of 4 gamers both the LAN game streaming as well as the Family View has been a really big deal.
Also, Steam Workshop.
There is a price you pay for convenience. Some are willing to pay that price, others not so much. The worry is that when you get too many people willing to pay that price is that it eventually no longer becomes an option. When that happens, it isn't a feature, it is a dictation, a control by the industry. Ultimately, you really don't want that to happen.