No reason you can't be sad for both. When you make money based on having a cultivated persona it benefits you to allow people to sink themselves as deep into your fandom as possible. You don't even have to be particularly active or purposeful about it. You just respond to your audience in whatever way gets you the best reaction and the most money, and like many other industries like gambling and mobile gaming you create dolphins and whales who will embrace a worldview where it's worth it to give you hundreds or thousands of dollars. The difference is that when the illusion is shattered the mobile gamer who wasted ten grand on Candy Crush can't send the CEO of King Digital Entertainment a private message telling him to go to hell.

There's no motivation for anyone to protect people. Twitch has no reason to stop viewers from devoting their time and money to a personal fandom and neither do the streamers.