A lot of these arguments make sense if you've been buying since the beginning of PF and have had the 10+ years to digest the rules as they've been released. But every year that passes there are more and more gamers who haven't had that luxury. I don't want PF to become one of those "cliquish" games that only the long-term and/or wealthy are playing.
GURPS is a horrible example. With the release of 4th ed. (back in 2004), Steve Jackson stopped doing the wave of both licensed and generic splatbooks.
I don't see how you could continue buying AP's without buying the rulebooks. Looking at the Mummy's Mask AP and the books it expects you to have, out of the hardbacks you need a fairly up to date collection. Add in the softcovers and it's overwhelming. PF has more softcovers OOP than most games (successful or otherwise) will ever release.
The cost of entry makes it very hard on the new gamer and every release makes it harder. As I said earlier, I can't get anyone to play PF; they'd rather play 13th Age. I could write an entire encyclopedia of why I think PF is better than 13th Age and it won't matter because they see PF as too big an investment.