Because every single exploit is a smart use of game mechanisms. The definition of exploitative behavior falls under impact and circumstances surrounding it, such as not everyone being able to do it while it grants the select few a competitive edge. And it does grant a competitive advantage when only the Russian pool (both factions), and the Alliance faction (both EU and NA) are the only ones able to form premades.
So the answer is simple, to either filter out the manipulation of metrics or to just let full chaos reign and allow full premades to queue for it.
One could argue
is a reference to such things, but it’s the most they have said about it for years.
They deliberately don’t want to admit it’s a thing in clear language.
One can also argue this is also an attempt to “fix” the manipulation of the metrics, but as we all know it is highly ineffective.