Random "unsophisticated investors" (e.g. me) are supposed to get some degree of protection from catastrophic mistakes we can't be expected to recognise heading our way, in order to encourage us to participate in the stock market without having to worry we might inadvertently be taking on some fractional responsibility for a debt exceeding our net worth.
Likewise, governments don't like it when pension funds are bankrupted because of what they invested in.
RICO came after 159 years of US experience with all the benefits of limited liability and in the midst of the Cold War where the US was fighting for the freedom to keep government out of the way of business, so selecting that as your magic legal phrase is about as sensible as trying to fight Covid lockdown restrictions by putting a printout of Magna Carta in a shop window.
Will this change investor behavior and industry culture? Yes, and that is not only a net good but absolutely necessary.
If you want capitalism as a financial system then holding the capitalists liable for wrongdoing that benefits them is the only way you avoid turning the planet into a hellscape.
Even in a more narrow case with no complications (even narrower than SBF, because he distributed money to good causes who can't pay it back), you're including the defence lawyers.
I'm (caveat: not a lawyer) more in favour of specifically criminal behaviour being handled by "piercing the corporate veil", putting the penalty directly on the humans who actually did the crime without letting them hide behind corporate personhood: https://en.wikipedia.org/wiki/Piercing_the_corporate_veil
But of course, it can be hard to prove who knew what, so sometimes "follow the money" is easier. And yes, I also agree with you that there are misaligned incentives in capitalism that lead to bad outcomes and we should work to improve that — just don't throw out the baby with the bathwater.
Financially punish the capitalists who benefit from crimes and the executives that are currently getting away with crimes won't continue to get away with anything. (Laws and regulations will change rapidly when money is on the line)
Punishing only the people responsible for the crimes is a losing strategy. You have to eliminate the demand for that behavior. Because there an endless supply of morally corruptible people to take the fall so that capitalists can gain.