Aimeebell is right that attending a meeting won't magically make you lose more weight.
But, for some people the in-person support, tips, topics, accountability and camaraderie are worth it. Especially during rough times, going in-person can open someone up to different options, or things they maybe never thought to do.
My thoughts on the matter are "can't hurt, might help, what's the worst that could happen?" The worst? You find out the meetings aren't your cup of tea and never wonder about going again. But, there's plenty of good to be had and there's always the chance that you'd pick a new piece of information or make a fun connection and find a tip that helps you work past your plateau.
~Made of star stuff~