You don't get what he's saying.
He means it's the big guns that count more than the price itself. Had Sony the bigs guns Nintendo has (Mario Kart, Mario, Wii Sports, Big Brain), and offered them as of launch throughout the launch year, there would be no need for a price cut on Vita.
The only problem is, since Sony doesn't have those big guns, you will most probably end up being right, but for the wrong reason.
I perfectly got what he is saying. Not even Nintendo could have been successful with a $250 handheld beyond the short term. Expecting the PSV to do well at $250/$300 if only it had the right games coming out is pretty much the same as believing the PS3 could have been a huge hit at $500 or more if only Sony and third parties got out all the big hits in time. As long as price remains a barrier, you cannot expect massmarket penetration; and most people aren't willing to suddenly pay more than their norm for a gaming system when they know that the price will eventually come down.