In Israel, the university you attended matters less than the unit you served. For example, if you want to become a senior politician, you join Sayeret Matkal and if you want to become an academic you end up in Talpiot (which the founders of Wiz are alums of).
8200s success is largely due to a couple early exits by 8200 alums (Gili Raanan, Nir Zuk, Shlomo Kramer) who were biased in recruiting from their unit. 8200 alums aren't better or worse than other Israelis - they just have a better network.
And Israel has multiple SIGINT and offensive/defensive cybersecurity units, all of whom created similar networks as well.