No, it isn't. The Harry Potter franchise has made so many young people interested in reading and watching films that it's grand climax deserves to be celebrated and given lots of attention. When I was 7 or 8, I absolutely loved JK Rowling's books, though I had read many, more advanced books before. The films have also been magnificent, partly due to the fact that Rowling refused to let non-British or Irish actors play her characters. Good thinking, Jo! 
Harry, we will all miss you, but if your fans want to read more, they can (shameless plug) visit MY new HP site afterpotter.yolasite.com
Goodbye