I think the skepticism is warranted because aside from that entry in the database, every other piece of evidence points to someone faking their death for internet attention, per Occam's Razor.
I mean, what's more likely: That someone who's feigned having a debilitating chronic illness for which she's been going on about hospice care and VSED for the past three months has finally faked her death, posted an obituary that was obviously generated by a computer, and is now writing updates as her "sister" to continue gaining e-clout? Or that this person really did die, ironically enough, and her actual family 100% believed her histrionics, wrote an obituary with ChatGPT for some unknown reason, and continues to post updates on her social media accounts in her memory begging for more subscribers?
To be fair, I think it's an extremely likely scenario that Chelsea did kick the bucket, but rather than dying of sepsis or some other typical munchie complication that can be milked for pity, she died of an accidental OD due to drugs that her family helped supply her with. And because her family actually believed her and is just as unhinged as she was, they won't accept that that's her cause of death -- instead, they fully believe that Chelsea died of Stiff Person Syndrome, that she really needed pain medication that nobody else would give her, and the mean ol' hospital docs still won't believe her about any of it, even after she literally died. I personally wouldn't be shocked if we never see Lacey post any proof of death that might allude to what the official cause was, just more bitching about how they're being "denied" whatever.