No, he had lots of help and this lady, who helped put him away, is also going away for two years because of her part in it. She would have gone away for longer, but she put effort into trying to correct her bad decisions.

I do not like the US judicial system and also I think this particular example is pretty reasonable.

Wikipedia states FTX had 300 employees total. How many were in the inner circle? SBF: pled not guilty, 25 years. Ryan Salame, co-CEO: pled guilty, 90 months. Gary Wang & Nishad Singh, co-founder & engineering director: pled guilty, awaiting sentencing later this year. Caroline Ellison, Alameda CEO: guilty, two years.

That's five high ranking folks 'in the know'. Likely others who knew but they didn't have enough evidence for an airtight case.