No. Child labor laws ended that.
So your thought is that anyone could have sailed the world successfully with that boat?
In 1968, with no sailing experience, he competed in the Sunday Times Golden Globe Race, aboard a 30ft yacht called Dytiscus retiring just past the Cape of Good Hope
He didn't have all that technology in 1968.
And how does that apply to this case? Sailing from the UK to Cape Town, within sight of land the whole way is different from sailing from Cape Town to Fremantle.