Wouldn't adding more decimal places be effectively be printing money though? As it's creating more money potential out of thin air.
No.
I don't understand why people have so much difficulty with decimal points.
1 -> 10 is inflation.
1 -> .1 is deflation.
1.0 -> 1.00 is increased precision.
1.0 -> 1 is decreased precision.
21 million total bitcoins =/= 21 thousand total bitcoins. Strictly speaking it is deflation. (edit: Not that it matters, mind you.)
Finite number is finite.
Maybe the most accurate definition of Bitcoin would be a ledger that grows to 1 0, base 21 million , because strictly speaking you could multiply or divide the total number of bitcoins in existence by any number you like, not just "10". The observation the OP was really making, though I'm not sure he realized it, is that you can change the base of Bitcoin to whatever you like and it's the same.
Of course it causes psychological problems, and other business, but whatever.
Edit: Lots of stuff lots of the time. Bases are confusing.