Yeah, speaking as a student, this is not really accurate. The SFS and College are not truly different worlds, and a history/government/economics major in the College is going to take many of the same classes as a student in the SFS. SFS and College students are also in many of the same clubs and take many of the same jobs after graduation. To the extent that there even are specific “SFS classes,” pretty much anyone can register for them at the same time; you don’t get priority for certain classes based on what school you’re in with few exceptions.
Also, you don’t have to have your life devoted to IR to do well in the SFS, you just have to want to learn a language and take a pretty significant set of core classes. For a policy/law career and social science interest, you could really do well in either school.