It's not easy. Georgetown has to rid itself of the Thompson / Ewing tree and era. That was 40 years ago...majorly ancient in any time period...I couldn't imagine being a senior in HS in '85 and a coach recruiting me would be a player from 1945! Even 1970, a mere 15 years, would seem very long ago. To us as we're older, that is nothing but to teenagers that is very old.
Mullin at St. John's, Penny at Memphis, Doherty at UNC, Davis at UNC TBD, Jordan at Butler, McKie at Temple, etc. have little to no relevance to today's kids. Especially those who have not won anything recently at the collegiate level that today's generation can relate to.
Exceptions doing well at their alma maters are Painter at Purdue and Howard at Michigan (this didn't age too well...).