Nah, the point is this: It's hard to convince someone to spend their hard-earned fiat on "bitcoins." But it's slightly easier to convince someone to download a wallet where they can receive money on their computer for free.

Then, you take advantage of that. Go to the bar with that person? See if they're willing to take bitcoin for your part of the tab (as was suggested.) Buy a bag of weed from someone? If it's your friend and they're even technically savvy enough to turn on an XBox, they'd be more easily convinced to accept payment in BTC than to actually buy BTC upfront. Your cell phone bill is in someone else's name (family plan?) that lives far away? Offer to pay in bitcoins. Etc etc. You can think of a bunch of examples to apply to your various lives.

Installing a wallet simply gives someone the option to receive bitcoins, and it is easier to convince someone to do that than to actually go out and buy them. Thus by adopting this strategy, we increase adoption faster.