Where we really get into trouble is sometimes we can't even trust the Bishop to do the Bishop's job...
Too true. But it's the bishops, and I suspect the "Vatican experts," who can't do their jobs who turn for help to bogus psychiatrists.
The last thing we need is a team of crazy psychiatrists deciding who to admit to the seminaries. The ultimate solution, as you say, is good bishops, who would know better than the shrug off their own responsibility like that.
A lot of bishops don't even know what it is to be a bishop.
They act more like facilitators of niceness and good feelings than the shepherds and defenders of the Faith they're supposed to be.