I dunno if JY necessarily wrote himself into a corner there. If the SM wasn't there there could theoretically be the all time ultimate jianghu battle as Xiao Yuanshan and Xiao Feng fight with Murong Bo, Murong Fu, and Jiumouzhi and maybe Xu Zhu and Duan Yu arrive and JMZ gets sucked while XYS and MRB get killed and a mass fight occurs or whatever. There are multiple ways to solve it, not necessarily Buddhist ways, but it's not like it was an unresolvable situation.