I thought the point was to coincide with new Assange coverage. One has to be careful what megalomaniacal espionage State that cynically abuses judicial processes is being discussed.
At the same time though, Russia definitely is not reacting to this the way an innocent party would. So even though Navalny's death mostly benefits the West, incomprehensibly it does look like Putin's doing.
Why would they want to admit that another country was able to assassinate this high profile prisoner in order to undermine them? It's a similar reaction to what happened after the West/proxies blew up the Nordstream pipeline.