I'm not upset about anything. He was a shrewd businessman, and I wasn't even alive when he was in the prime of his creating the cult of personality that still exists to this day. It's not like it negatively affects me somehow or anything.
But if Roddenberry had managed to secure any sort of real purchase in the industry outside of Star Trek, he'd have taken it. He stuck with Star Trek mostly because nothing else he tossed out actually landed, Star Trek still made him money, and Star Trek fans were more than eager to tell him how genius he was to have made what he did in the first place. I'm not saying that negates the fact he inspired people at all.
What "purchase power" does a writer have when his TV show only runs for 3 seasons and doesn't gain a cult following until later? He owned the rights and fought for as much creative control as he could during the creation of TNG before his death. You're focusing on the business side of Trek which is the last thing Trek is about.
They don't even use money in the future!