There is tremendous value in networking and networking adds value to you. Networking is much more than prospecting and selling. In general, it involves interacting with those around you (face-to-face, over the telephone, e-mail or text, and even using social media). Nevertheless, you engage in networking for the purpose of the people around you and at the same time position yourself to receive help.
Now it may not work HOW you would like it to work. For example, you go to a networking event hoping to meet accountants who might know of people interested in buying a franchise. To that end, nothing pans out, but you do learn of a job-transition group that you were not aware of. Networking did not work HOW you wanted, but it worked.
Networking may not work WHERE you want it to work. The next day standing in line to get coffee, you strike up a conversation with someone who reveals in polite conversation that they are looking for more freedom in their professional life. Networking did not work WHERE you wanted, but it worked.
Finally, networking may not work WHEN you want it to work. For example, again, you go to a networking event hoping to make contacts to help you find clients interested in franchising. You seem to come up empty. Then a month later, a year later, or even a decade or more later, someone reconnects with you from that event looking to be your client. Trust me, this happens. Again, networking did not work WHEN you wanted, but it worked.