Sequoia also backed Apple, Cisco, Google, Youtube, Instagram, LinkedIn, PayPal, Reddit, Zoom and many more. They are just one of the largest VCs out there.
There is a difference from backing a fraud vs backing a failure.
No one is pointing fingers for the latter.
SBF would have never done anything with a simple BoD requirement: independent auditor. That was not done by BoD. This is a very standard requirement for most companies beyond A. SBF got special treatment. Why is the question