Mark,
I am not asserting the drive is more dangerous - just more difficult. Neither shot is particularly dangerous - no OOB, no fairway bunkers where you chop out sideways and can't reach in three, no water and almost no chance of a lost ball.
And at 458 meters the hole is easily long enough to qualify as a short par five.It is only a quirk of the scorecard that its a par 4.
If it was a par five would it be the 'hardest second shot in golf?'
No. The second shot at the 12th at Kingston Heath is a more dangerous - and difficult - second shot into a par five.There is no question 13 is one of the hardest par 4s in Australia but it is not a hole a good player is ever contemplating making 6.
For a higher marker it is harder - but its a three shot hole and, sensibly played, an easy hole to make 5
Anyone playing The Road Hole for example is always aware of the places where making 6 is a real possibility.