Laskern: define bubble please. Are you talking about going to college for example, or simply a doctor’s appointment?
The idea of sheltering girls is, espcecially by Chasidim, that it’s lifelong, or at least until they’re married and on more solid ground when they may choose to expand their circle. Those that marry later definitely have more nisyonos in this regard, but I don’t think less sheltering at an early age is the answer here.
What helps in these cases is to have guidance on how to make changes and for support, and actually WANTING to remain pure.