Bit tangential, but what the heck is it with scammers saying "dear" so much? Pretty much every pig butchering or social engineering attempt has had them repeatedly addressing me as "dear."
Many companies outsource their customer support staff as well.
That, and the fact that LLMs are now available to pretty much anyone for effectively nothing, would make me very cautious in basing my judgement of something being a scam or not exclusively on a caller's accent, spelling, mannerisms etc.
Lately, it's actually been quite the opposite in my experience, and I don't find that too surprising either: A lucrative scam business can afford to pay much more than the average US company that sees customer support as a cost center to be optimized at any cost. So why wouldn't their staff's English be better?
Social engineering scams are about to become a lot more exciting (in a bad way), not least thanks to LLMs (with and without voice capability), and I think people are absolutely not ready for it, not even us professionals working in tech.