We're discussing two issues. First, there's the issue of granting minors basic legal protection from unwonted sexual material and sexual advances. Second, there's the issue of coddling them and not properly educating them about sex.
The first issue is not necessarily synonymous with the second. Sex ed in this country is certainly inadequate. For example, many school districts continue to teach abstinence-only ed, despite dozens of studies showing that it doesn't work. The solution is to focus on improving children's access to sex education while granting them basic legal protection against sex offenders.
Children don't have to choose between being coddled or protected from abuse.