Right on. At least they give a reasoning. It does feel kind of arbitrary but maybe they had a history of older applicants failing abysmally. It would be nice if that is the case that they would actually make said research public information. If you are going to blanket exclude a group on possibly shaky legal grounds (age is a protected class) you had better have some data and explanation to back it up. Even then with the data it feels more appropriate to say something like “<1% of applicants over 30 succeed, we strongly discourage you from applying”, rather than just saying “sorry, you can’t apply at all because you’re over 30”