I’m in a somewhat opposite situation. I never fancied my son would follow my footsteps to attend my alma mater, not only because it doesn’t practice legacy admissions but also because I had confidence that he would be able to take advantage of similar opportunities anywhere he ended up. He didn’t finalize his choice until late April and he chose my alma mater. He chose it based on extensive research of and comparison among his list of acceptances, he probably wouldn’t have chosen it if he had thought that his legacy status helped him with admission to the school.
From my perspective, the only advantage/benefit was that I had more knowledge of what his experience in the following four years was going to be like, and did impart some of that knowledge to him before he went there.