For many colleges that is essentially correct, if they cannot guarantee single housing.
You have to decide if “single housing” truly is a make-it-or-break-it factor for you while making your (then much reduced!) college list?
Either you decide now if you are willing to “deal with it” (that you might get your preference, or very possibly not), or else, only apply to colleges that do not mandate first-years to live in their dorms.