I think the first post is extremely ignorant and biased. It is a given that not all smooth jazz is good (the same can be said of any music for that matter). But to deny the lineage that connects it to "real" jazz (whatever that term means) is shortsighted at best.
I hear the phrase "instrumental pop" a lot and that is a good description. But if so, what are the covers of Tin Pan Alley tunes done by countless jazz musicians in the 40s, 50s, 60s, etc? Pop tunes done instrumentally, right?
I don't think the original author of the first post has ever actually seen a smooth jazz concert. I finally did a few months ago and the experience helped me understand what it's about. It's about playing pop tunes instrumentally, soloing over the form, people dancing, singing along, having a good time, etc. It's a live band playing your favorite tunes instrumentally and taking solos. Sounds familair.
Yes, some of it is absolutely wretched, especially the stuff on the radio (again, that can be said for any music... usually the worst examples a genre of music are played on the radio) but I don't think it is pretending to be anything it isn't. And it definitely was not created by suits, it was created by mucisians. Now, the suits may have helped "dilute" it as they often do with anything that becomes remotely popular. But to give them credit for the creation is ludicrous.