The main reason the debates were so active for a while was because creationists were actively trying to get public schools to teach their beliefs in science classes, with the science education community opposing them. The courts had ruled against creationism in the 80's, so in the 90's and early 2000's creationists tried a few other routes....."intelligent design", lobbying to remove "natural explanations" in state science standards, getting "warning stickers" on biology textbooks, "teach the controversy".
So there was a lot of public interest, which meant there was a lot to debate.
It all culminated in 2005 with the Kitzmiller v Dover ruling, where a federal judge pretty much dealt a death blow to "intelligent design". After that, science education advocates were quite effective in getting states to adopt science standards that included teaching evolution. Now it's not even an issue in most of the US.
As I put it to one group of science defenders in a forum where we used to battle creationists......"We won!!"