Families break apart because the persons involved don't make the necessary effort to uphold the relationships anymore and there are no economical necessities th

Families break apart because the persons involved don't make the necessary effort to uphold the relationships anymore and there are no economical necessities that hold the people involved together. Not because of prostitution. Prostitution (might) spread STDs because there is no regulation and oversight, no health-check mandate for prostitutes (of either gender). All those issues you cite don't really stem from prostitution and making/keeping prostitution illegal will not make them go away.