Knowing that a dollar bill can be divided into 100 pennies does not change my opinion of dollars.
And what if it was decided one day that it could be divided into 1000?
Why would that matter? $1.00 is still worth $1.00 whether it is a dollar bill, 100 pennies, or 1,000 subunits. It's still $1.00 the whole time, and nothing changes by making it more divisible.
Are you arguing that getting rid of pennies would make $1.00 more valuable, because it is less divisible? Because if not, your argument makes no sense.