I do believe that most parents who give their children the time and freedom to grow up are very aware of risks like those you mentioned, but they'd rather take

I do believe that most parents who give their children the time and freedom to grow up are very aware of risks like those you mentioned, but they'd rather take that slim chance than raising a child that, in a way, may be crippled for life. At the end of the day it's just weighing a bunch of different risks and outcomes against each other. Different people come to different conclusions about "what is best" and there can be no definitely right or wrong approach - not unless people could agree on what they actually wanted to achieve/raise.