I don't know any wedding professional who doesn't have strong feelings one way or another toward wedding shows (also called bridal shows in antiquated, non-gender-neutral times). Some find them to be an invaluable marketing tool, while others have given up on them altogether, convinced they're a complete waste of time.
Those of us who have been around a while, though, seem to share the mindset that, while the majority of wedding shows aren't the right fit for our business, there are some that can help bring exactly the right clients to us, in a comfortable atmosphere that allows us to really connect. That's why, in my opinion, blowing off wedding shows altogether is kind of like throwing out the baby with the bathwater.