Critique someone's argument for the necessity of sterilizing feral cats in order to control overpopulation.
What an idiot.  What do you think would have happened without sterilization?
In that time period the feral cat population would have quadrupled or more, maybe quintupled.
We laugh at you.  At your illogical stupidity.  Without TNR, you would be buried in cats.
Feral cat populations expand for two reasons.  Illegal dumping of unwanted pets or kittens, and propagation of fertile cats.  We need a two-pronged approach to reduce ferals: 1. Prosecute abandonment.  2. maintain and expand TNR.
Exterminating cats will not have an impact on marine mammals for dozens of years.  You yourself have stated that oocytes survive in the soil for a very long time.