I think there are two issues here...
It may be possible to allow your child to roam the net and do so safely, with a degree of common sense and responsibility.
However there is a lot of stuff that will creep through and this can be monitored and removed by this type of software.
You are not neccesarily restricting their use, just making it simpler and easier.
Let me give an example. Suppose they want to look up an actress - it will allow them to do so, but will remove the sex scenes and fake nude pictures.
It may be possible to allow your child to roam the net and do so safely, with a degree of common sense and responsibility.
However there is a lot of stuff that will creep through and this can be monitored and removed by this type of software.
You are not neccesarily restricting their use, just making it simpler and easier.
Let me give an example. Suppose they want to look up an actress - it will allow them to do so, but will remove the sex scenes and fake nude pictures.