I don't think this is necessarily true. Currently we're trying to push computers to do things that are relatively easy for humans to do. I would conjecture that these things are easy for us, not because we are amazing learning machines, but because we have millions of years of evolution, and years as infants with caring teachers going for us.
So, I think we are actually data efficient learning machines, just that we have strong priors, and we spend a lot of effort training each other.
If you compare humans to machines on problems which are not intuitive for us, I think you will find machines to be more data efficient than we are.