Change wording here to “the only evidence” and your claim becomes specious.
The “Trump Dossier” is also evidence — again it is only hearsay.
There is also confirmation from Guardiann sources in a Russsian hacking collective, Humpty Dumpty.
I also point out that no US intelligence official has disputed the claim that Russia hacked the election to favor Trump!
Further, the fact of the election itself is highly indicative. Hacked files from Clinton disclosed publicly but nothing from Trump.
It’s perverse to cry “no evidence” when there is so much evidence. Even IC’s unanimity on the subject is evidence.