Does Windows Mobile have an official app store? I really don't know, but I've never heard of one.

If it doesn't, your comparison is misleading, because Palm's app store will (presumably) address the problems you're talking about. Pre owners who are worried about those problems can use the app store and not bother with developers who don't distribute their apps on other sites. And, obviously, developers are going to WANT to get their apps onto the official store to get the widest audience.

I remain unconvinced that the lack of choice is helpful in any way.