Nah, it's true that most fail. And if most made it, then it means it's an easy job. Also, Bill Gross aka Bond King ragequit the game because he lost.
Asking for Sharpe or Sortino is pretty useless. Because it depends on the risk mandate. How large annualized MDD you are willing to commit to is flexible, it can go all from 0% to 100%. If you risk 5% of eq your sharpe, returns, etc will be one number. If you risk 10% of eq it will be a different number.
99% of people on this forum claiming they have a winning strategy and looking for funds are fake or lies.
In any of the cases you cited you would have to at a minimum know your Sharpe ratio to proceed, no? Or to take a step back, at a minimum knowing and understanding what it is and what it represents is a necessary but not sufficient requirement to get in the door for institutional funding. A requirement that many here would fail.