That’s kind of a strange assumption on Apple’s part if true… wipes are a fundamental tool of motion graphic design after all, and plenty of people don’t use FCP as part of the design process, they import all their assets directly into Motion.
All the other motion graphics apps I’ve used provide specific wipe functionality… when you’re about 20 layers deep and you think “You know what would be cool? A soft-edged diagonal wipe bringing that element on”, you don’t really want to have to change apps to find purpose-built tools for doing it.
But I guess when you’re offering cool stuff like behaviours it’s easy to overlook the need for boring basic things like wipes! 🙂