I've known and hung out with a lot of prosecutors. I've never heard one say anything like that outright, but, one of the main issues is that in 99.9% of cases the evidence will not be looked at. They are just not given the time and resources to even take a single glance at the police reports, never mind any forensic evidence. They literally have no idea whether the person is guilty or innocent when they offer a plea deal.

Even your paid defense attorney might never look at the case files at all. Jared from Subway's lawyer got into hot water because he got Jared to take a plea and it turned out he was factually innocent of one of the many offenses he was charged with, and that fact would have been uncovered quickly had the defense attorney ever looked at the evidence, which he said he had not.

I doubt any professional prosecutors would say this out loud. This is likely a disciplinable or disbarrable statement.

This is effectively a truth, but prosecutors are generally held to high ethical standards, where they are expected to drop cases / not bring cases if the evidence doesn't point specifically to the defendant.

That said, there are occasionally times when prosecutors have been caught hiding / burying / not sharing exculpatory evidence (something the police / prosecution found which would help the defense's case against the prosecution). The only reason to do so would be to sandbag the case against the defendant even when there is a shadow of a doubt in the prosecution's case.