Um, isn’t the knowledge of many spurious arguments and no strong ones over a period of time weak evidence that no better argument exists (or at least, has currently been discovered?)
I do agree with the second part of your post about argument matching, though. The problem becomes even more serious when it is often not an argument against X from someone who takes the position, but a strawman argument they have been taught by others for the specific purposes of matching up more sophisticated arguments to.
Hi, been reading this site since it split from OB, but have never commented, though on occasion I have been tempted.