User blog comment:Real Godisme/Chapter 481/@comment-25111584-20160411135846/@comment-7418318-20160411172928

It's quite selective how you play the "It's Hiro's fault" card.

You only say it's Hiro's fault for so often reducing Lucy to cheer-leader once Natsu arrives (which is NOT the ideal formation; support is one thing, not doing anything quite another).

But isn't it also Hiro's fault for writing Lucy into situations where she needs rescuing in the first place, even when she should theoretically be strong enough to not need it?

Apart from that, you have yet to provide a single example of Lucy "interfering" in Natsu's fights.