I mean, CrowdStrike are supposedly experts and their "proof" of Russian involvement in the DNC hack was complete bullshit[1], except "trust us, guys, we promise." Their president even had to testify in Congress to that effect admitting so.
If they could get away with that, might as well anyone should try to.
[1]: Some spurious web request logs probing for PHP vulnerabilities leading back to Russian IPs that literally everyone also would have in their logs (as I do for every website I've operated ever).