Why do SIM cards keep getting smaller, but the phones are getting bigger?

THAT DOES NOT MAKE SENSE
https://www.youtube.com/watch?v=6Xywqv1cDH8

So now we have the micro SIM, the micro USB?
What's next? The nano SIM, the nano USB?

A SIM card so small you need an electron microscope to insert it?
A USB charging cable so small, you need Sherlock'

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s Holmes magnifying glass just to plug it into your phone?