I mean if it was 2.1 million Bitcoin and 1000 million Satoshi or 210 million Bitcoin and 10 million Satoshi it changes the scarcity push.
Satoshi is literally a lower unit of Bitcoin. $1 is equal 100 cents, this does not increase the value of a dollar in any way, it's just a way of representing it in lower units.
If you have a single room to house 10 people, demarcating it into little corners does not solve the the housing problem; little corners does not make a room, 1 Satoshi does not make a Bitcoin.
There are 2,100,000,000,000,000 Satoshi, so if 100 Satoshi (or in tradition money standards 100 pennies), that would mean 21,000,000,000,000.00 Bitcoin. 21 Trillion Bitcoin doesn't sound so scarce now does it...
This doesn't make any sense.
This scarcity argument is a tired one and anyone who brings it up doesn't understand how Bitcoin or measurements work.