I think Android users are just less likely to spend money on apps/content vs iOS users.
On webOS (myself, wife, daughter) I had the option of requiring a password every time an app was purchased or just letting my 13 year old daughter rack up whatever credit card charges she felt like on her phone. I don't consider it a PITA to enter a password, I consider it a security feature. I am shocked that you imply that android does not have such a requirement and I feel further vindicated in choosing webOS over android.