I'm not convinced that's the case. The rules seem to imply that, but the spell description and sample characters don't.
I would agree whole completely. Balancing costs via prerequisites is a terrible idea(for an example, see Exalted). The only reason one feat should require another is if a)it's an improved version of the first one, or b)the ability doesn't make sense unless they have the other feat first. In 3.x, Cleave requiring power attack or mobility requiring dodge was silly, the abilities are unrelated, but Great Cleave requiring Cleave, or Spring Attack requiring Mobility made sense(don't get me started on Whirlwind Attack).
If a feat is too powerful to just offer outright, make a weaker version of it.