So that they can unjustly enrich themselves at your expense without an excessive fear of civil penalties.  I am frankly surprised that I haven't heard of any actual scammer deaths by mob vigilantism, in crypto, lo these many years.  Wassup with that?  

I think it is pretty annoying that they would imply one thing but rely upon its opposite, yeah, but as long as it is fit for purpose I will use it as necessary.

However, it isn't actually necessary.  Elsewhere it was drawn to my attention that bitfinex xmrusd is actually doing a good tick these days.