Absolutely true.
Pardon me once more: so, all a murderer (or an assertively impatient heir or a cost-managing "health" "care" "provider") would have to do, to make sure a vulnerable person ended up well and truly dead and to forestall any awkward investigation, is to craft a suicide note deemed plausible by GSlob?
(Or maybe not even a note, eh? Just "Well, she did talk about being tired of living"; "I recall now she said she'd rather be dead under the circumsances"; a belated memory, however vague... hey, it worked for Michael Schiavo...)