No rudeness was intended. I regularly see first time publishers with no demo and a price tag, wondering why no one buys. But people do not start as a developer. They usually play games first. It just baffles me, how those new developers seem to forget their previous player experience.
To put it in other words, I wonder how many dollar games they previously purchased as a player. Games that they had no previous knowledge and there was no demo available. From an unknown developer. If the answer is "zero", there you have the reason for my apparant rudeness.
If the answer would be "lots", it would be understandable to publish it similar to the demo-less games they purchased.