Me neither - if the person knows me or really needs to speak with me, they'll leave a voicemail. A few times I've received scam voicemails where a recording is speaking in Chinese. If I knew Chinese I would know what the hell they're ringing me about ....I don't even answer calls from numbers I don't recognise. They will leave a message if it's important and I've yet to have a voice mail from a scammer that wasn't obvious.
Weitering may have made some mistakes, but financial scams and crimes are a huge, escalating problem. It's an arms race between the technology and knowledge of the good guys and bad guys.