I am not responsible for your misinterpretations of my statement. ;-)
I will just quote right out of the yeast book by Chris White
"A high concentration of yeast in a small amount of wort results in very little growth...While the cells do not multiply much when the inoculation rate is this high (100 billion in 1/2 liter) it can still benefit existing cells. The take up of sugar, nutrients, oxygen, and the production of compounds such as sterols, improve cell health. Starters rarely have a negative side; even if there is little yeast growth, a starter helps to revive yeast for fermentation by activating metabolism, and therefore fermentation starts faster"
"The most important thing to know about starter size is that the inoculation rate affects the rate of growth...It is not the volume of the starter that is important, but how many cells you add in relation to that volume"
If I had a laboratory fresh culture with 100 billion cells, I would not make 1/2 liter starter with it. There would be no point. If I had 100 billion older cells low on vitality, it could certainly be the way to go.