None of that is steelmanning either. You're making a very common mistake of dismissing evidence ("the existing evidence is, at best, of extremely poor quality, and at worst, outright fraudulent") which with benefit of hindsight appears to be both accurate and in good faith [0].

Now that evidence wasn't conclusive (indeed, the argument for ivermectin in 1st world countries has been more or less demolished), but someone has to do what Scott did and come up with a better reason to dismiss the evidence than an appeal to authority. Just claiming you want to ignore it because experts ignore it is hardly a strong argument compared to a pretty reasonable number of studies showing a positive effect. And it is easy to see why some people would turn to conspiracy theories if that is the best other people can come up with in casual conversation.

[0] I mean, you go to a region where 10% of the population has parasites and hand out ivermectin. That'll have a fantastic effect on COVID outcomes. There'll be an obvious positive impact that any study would pick up.