Since we are a deranged hellscape of a country when it comes to incarceration most people probably take the wrong lesson from these moments.
Also note that as part of his sentencing, Sam Bankman-Fried has to pay $11 billion, which probably will effectively take the rest of his life.
Since there isn't parole in the federal system, even under the best circumstances he's looking at serving a very long time (~13-21 years).