Any bowler once he is under the pressure of a batsman smashing him loses his game plans and panic sets in, Buttler in this mood puts the best bowlers under pressure, Yes it's a fine line between winning and losing playing this way, But if your stuck just scoring 1s and 2s and making 140 to 160 you're going to lose anyway,
Also having wickets still in the shed when chasing a score is pointless, Playing like today vs India or the Aussies is the only way to beat them because 100% they will play hard and smash you.