The 24-year-old returned to goalscoring ways with a 47th minute header to sink Neil Warnock's newly-promoted side on Saturday afternoon.
It was the forward's first league goal since October and Kuyt feels it was the perfect way for the Uruguay star to respond to recent media scrutiny.
"For all of us it is important to score a goal but especially for Luis, who played really well. It was good to see him scoring again," Kuyt told liverpoolfc.tv.
"He is just focusing on the game and he is happy with all the support he gets from the club, players, manager and his own fans.
"This is the Premier League so they (opponents) are trying to do everything to stop you and the better you are the more they try to stop you - and Luis is a really good player.
Watch the best of the action from our 1-0 win over QPR
"But that is football and he knows that and he is a great professional and is just focusing on his job - that is what he does in training and in the game.
"Luis has done great so far and he is a great player."