One of the biggest concerns I have with phone scams is that the people most vulnerable are the elderly, and they don’t have the knowledge on how to block these calls (if a technical solution is the only option).
And further to that, the elderly are also the ones who cannot block unknown numbers, because doctors’ offices seem to have random numbers they call you from (they may have a pool of numbers but it’s not reasonable to add all of them to contacts). Blocking all unknowns would block these important health related calls as well.
AARP's magazine and bulletin[1] are pretty much filled with scam-awareness articles every issue. It's an absolutely major concern.
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Notes:
1. Incidentally, the first and second largest-circulation magazines in the US now: <https://www.magazineline.com/blog/most-popular-magazines-in-...>.
> because doctors’ offices seem to have random numbers they call you from
This is a huge issue with scam/security awareness education. Too many legitimate orgs use the exact behaviors we tell people to avoid. Same thing with email, can't tell someone to never click links in emails when services keep relying on magic links, third-party notification domains, etc. SPF, DKIM, and DMARC do nothing because scammers will just typosquat.
In the phone number example, most of those numbers too are unlisted outbound numbers, you couldn't even google them to verify.
Half the battle is getting legitimate organizations to stop acting like scammers in the first place so that shady behavior becomes an obvious red flag again.