I’m going to challenge the assumption that big schools like Purdue, Pitt, etc… don’t have personal attention from advisors and professors. That just simply isn’t the case. My daughter was on a first name basis with her dean, most of her profs, and had the same advisors that followed her through all 4 years (one for honors, one for her major, and one for co-op. She also had plenty of classes with less than 20 students and some with fewer than 10.
OP - Your student should choose the school where they feel most comfortable and is affordable for your family. If costs are the same, do a deep dive into the four year plan of study for their major and their minor. Take care to look at the depth of electives.