No, it's ok to nerf older content to help players catch up. It's all well and good to say "it was tougher when we did it!" but a new player doing the content nowadays, if the content is not made easier, will have an even HARDER experience due to a lack of players willing to participate. If the fights are a major chore to go through, and are older content and thus don't drop high end gear, who's going to want to go back to help them? They would literally only have the people at the same level of progression to choose amongst when it comes to finding party members, which means long times spent looking for a party, as well as a lack of players who've done the research and learned the fight, as those players would quickly move on upon beating it.