Newbie trying to understand Keyword Planner

Hi,

This doesn't make sense to me because I expect 'anderson cooper' to have a lot of searches. I did a "Get search volume" on 'anderson cooper' and I saw roughly 301,000 Avg. Monthly Searches.

I then moved to "Get estimates" to see how this will play out. It now says Impr are 142.86. How come it's 142.86? When if I divide 301,000 by 30, I should be seeing approximately 10,033.

Also why is the CPC so high when the search volume is literally 142 something on a GLOBAL scale?!

Sorry, I'm new so my basic understanding is being thrown down by what I'm seeing. Tried exact, broad, and phrase and they only get lower when I'm going with exact. There's so many more keywords here that when I target (sometimes by country), I see numbers that don't make sense. For example, I type in the name of a popular celebrity in a particular country and I _know_ I should see a high avg monthly search, but I don't see that and instead see it in low hudreds and sometimes 2 digits!
Even search for "Toronto defence lawyer" targeted to Toronto, Canada and also just Canada.. and sometimes there's 10 searches that show up average per month. Makes no sense right? But ofcourse, their CPC bid shows high competition.

Please help me understand what I'm missing here..
Thanks much!