Sure it is, let's look at some of the players Gerrard has played with.
Hamann - won the league in Germany, played with Gerrard. No league title.
Berger - Won the Bundesliga with Dortmund, same
Mcallister - Leeds, same.
Babbel, Ziege, Glenjo, Sturridge......
Can't prove anything without a control method.
So who won the league after leaving Gerrard?
Owen, Suarez, Alonso, Mascherano....
Djimi Traore won the Champions League with Gerrard. I bet even Diego Maradona and Pele would have been able to achieve that.
You are whopping thundercunt if you really thought what you just posted passed for a valid argument.