I don’t see how that follows at all.
For one, a curriculum has little to do with school type. There are liberal arts colleges and universities with open curricula (e.g. Brown, Amherst), liberal arts colleges and universities with core curricula (e.g. Shimer, Chicago), and a vast number of LACs and universities with distribution requirements that range from minimal to extensive. A student in a college of arts & sciences at a university is receiving the same liberal arts education as a student at a liberal arts college – although their classes may be larger, and they may encounter more graduate students.
If anything, universities offer more academic flexibility than LACs, as they tend to offer a much greater number and diversity of majors.