It honestly depends on the meeting through. I think at the onset of a project, or if you're having like a brainstorming meeting, introductions can help loosen everyone up and understand where other people are coming from. They have a very legitimate purpose if people will have to work cooperatively. That said, if you're never going to have to talk to each other or work together in any real way, or if you already know each other, sure, skip that and get to the real content.

There's a reason that introductions and ice breakers are included in adult training and team building activities. They can legitimately change the mindset of a hierarchical "here's what you're doing and you don't get shit" to a collaborative space for sharing. People who are engaged and feel their opinion is valued are better contributors and learners.