By far, no. I'm a fan of animated movies (even started a fan club of one in particular on this forum). It's a shame why so many people diss them because they are drawn. In fact, some of the best movies of all time are animated.
Whoever thought that animation is childish seriously needs to get in touch with media. There's several adult cartoons out there.
However, that's not my main point. I'm absolutely fascinated with animation. From what I know, it requires a large amount of skill, patience, and motivation. I plan to make animation a part of my art career.