I think there's a significant amount of nuance in this situation. On the one hand, I don't object to people steaming and monetizing suggestive (or even explicit) content. These content creators should be able to produce and monetize this content without stigma.
On the other hand, I do think the juxtaposition of this content with the rest of Twitch content is problematic. I think putting this content in the same category as gaming content unintentionally conveys the message, "Men garner popularity by exhibiting their skills, women garner popularity by exhibiting their bodies." I suspect this juxtaposition of the most popular male streamers' content with that of some of the most popular women's content on the platform and exposing this young people ends up fostering non-productive attitudes among boys and young men. Other women on the platform have complained about their audiences pressuring them into producing similar content. I've also heard from women and girls that it's off-putting to see the prevalence of women in bikinis, not playing any games, on a platform that ostensibly about gaming. I think Twitch is in the right to see this as a problem.
But what's the solution here? On the one hand, I think it's giving these streamers the short end of the stick to have ambiguous policies and issue unexpected demonetizations or bans. Maybe a more effective approach would be to have stronger separation between "just chatting" content and gaming content, to retain this content but mitigate the problem of that juxtaposition. I suspect this is what the "Pools, Hot Tubs, and Beaches" category will probably be, but maybe it'd be better to spin this off into sister platform that isn't explicitly tied into gaming.