Earlier quoted context omitted.
That's a straw man argument. Andrew said that the reason the court doesn't decline a lot of requests warrants is because the cases that are not "airtight" never make it to the court. I think this is a fair response to the original comment analyzing the court's "historical performance" as being too lax.
Why should we believe Andrew?
Separately from belief, which is somewhat subjective (i.e. it involves more inputs than is practical to list in a discussion), it's important to realize that on a logical level, there are at least two interpretations to a 99% acceptance rate: (1) the bar is really low and (2) there are pre-filters. The certainty with which I often hear (1) being declared or implied seems to miss this point.