I'm inspired that engineering students would make something useful for a change and something so impactful to a beautiful little life. Hopefully more higher ed programs will follow this example.
By that standard, I could say hammers aren't useful because I personally don't have a use for them, or payday loans aren't useful because I'm personally opposed to them.
P.s. If you don't need shelter or something to eat then yes a hammer will be of no interest to you. Likely, you've found your sugar daddy / mama on Tinder ;)