“Are there many frum people without a rav??””
Actually, a fairly nuanced question. As Sarah Palin would say, among “REAL Frummies” they “go by” the Rav of their chassidus/yeshiva/shul/beis medrash etc. A study a few years ago by some YU professor found that among MOs (aka Young Israel types), they tended less to always use the rav of their local shul as compared with being their “own Rav” and intellectually researching whatever inyan was of concern and making their own decisions w/o consulting anyone. Obviously not what chazal had in mind in re “aseh l’cha rav”.