Generally. But also without knowing their thought process, we don’t know if they eliminated a school for some reason or if they just never considered. To that end, since the goal is to help the student, there is nothing wrong with saying “If you like X, consider Y.” Off-topic would be, “I liked the frat parties at Y when I went to college 39 years ago.”
Similarly, nothing wrong with suggesting running the NPC, although I think we can move on from suggesting it yet again. The message for the OP is that “We’ll figure it out” is not a strategy, and having the parents’ understanding of costs now will be better than later, after the OP has worked in apps and gotten accepted to an unaffordable dream school.
Regardless, best practice is not to tell users what they can and cannot post; leave that to the mods who earn the big bucks. A problematic post can be flagged to bring to our attention.