Oh lordy, no. We definitely do need another section dedicated to gambling, whether bitcoin is mentioned or not. You said you checked out the gambling section(s) so you must have realized that most of what gets posted there is 96% garbage churned out by members in gambling-related campaigns and who never stray very far into other sections.
I fully agree with TSC's opinion, there's no need to have another section of the forum entirely dedicated to gambling and those casinos that OP mentioned should remain in the current gambling board. Without any doubt most of the topics and posts in the gambling board have nothing to do with Bitcoin, and most posts of those boards are created to meet their weekly post quota of gambling signature campaigns. So, it's better in the current way rather than making new board for such casino that neither accept Bitcoin payment or have Bitcoin in betting options of their platforms.