You are missing the point.

The important factor is the semantic re-basement, the terms used for the powers of ten can vary over time and geography. 

The human instinct to hoard collectibles has driven the adoption of Bitcoin. For this to continue to be a strong driving factor, the amounts that typical new users are able to acquire should be referred to as full "bitcoins". At this point anything from 1 to 100,000 satoshis would work, but the smaller units scale farther into the future, if we assume further S-curve adoption.

Lakh is just a good term to refer to units of 100,000 of anything, because it is a simple single syllable term, and is already familiar to many people.