Personally, I think many of the chareidim in Israel are not strong enough to withstand the temptations of life outside of the yeshiva. Much like the haskalah movement in Europe pre WWII.
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This may be the case with the bottom 10 percent. However, I think the medine is not and never will be ready to allow charedim to enter society, as the influence will be the other way around. The few moderate charedim who have entered society are not falling apart (although they are losing some of their rear flank) – they are attracting others. In these days of veheyshiv lev avois etc, I don’t even worry about the OTD, because any children they have will have grandparents, uncles, aunts, cousins etc.