Everyone is taking these tweets really seriously, and I'm like 95% percent sure it's a stunt. From the era kicking off with a list of ridiculous PR tactics she should try, to the tiktok of someone bashing her head against a sink because she's "tweeting" again that's posted days before she tweets this.
If the album rollout is going to be long, she needs ways to keep her name in the conversation, and sharing a series of "hot takes" that centers around her album cover, where every post is getting 1.5 million views within a few hours is a pretty smart way to do that. I think Charli can be a lot, but I also think she's a bit more self aware than most people assume.
People put too much stock into "will this controversy hurt her?" when controversy is currency in today's music landscape, especially when most of today's audience has the attention span of a goldfish. By the time the album comes out it'll end up being "She's a bit cringe/annoying but the album slaps", etc.