The people that have the most to gain from attending conferences are undergraduate students, recent graduates, and those looking to switch career fields. They are the ones who can benefit from listening to speakers who talk about current research in the field, meeting managers and heads of divisions of the big companies in the field, and talking to people already employed to see what it is truly like to work in that career. These are the people that conferences need to be marketing to because they have the most to gain. How else is an undergraduate going to know if they are better off working in engineering or computer systems? Conferences allow an unparalleled chance for learning and reaching out to others that students may never meet otherwise. They can network and find jobs while also showing companies the kind of talent that is soon to be entering the workforce.
Conferences can be utilized by both employers and future employees to start a process of learning about new advances, making friends, and connecting as a community that serves the same career field.