When I applied to college back in the mid 70’s, I applied to 3 SUNY schools (one application at the time, up to three schools in ranked order. If accepted to first, not considered for other two) 3 CUNY schools (same deal, one application, up to 3 schools) and two applications to private (IVY). Accepted to both privates, and both first choice public, so depending on how one considers the public applications, I applied to somewhere between 4 and 8 schools
When my son applied 40 years later, he applied to one SUNY, one out-of-state flagship, and three privates (IVY), for a total of 5 applications. Accepted to all.
For better or worse, we are part of a culture with near infinite choices. Some will keep swiping left and right, others will know what they want and go for it.
If you apply wisely, you don’t need to apply to dozens of schools. If you don’t, should there be a rule to force you to trim your list? I don’t think so.