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I know that LFTs are effective, but they are not perfect.
I think the point is that they're pretty damn good at detecting whether you are infectious or not.
But that's not the same thing as being infected.
Plenty of people will test positive on a PCR but negative on a LFT. The difference is timing, your immune system, and plenty of other factors.
It's also perfectly possible to have quite obvious symptoms and still not be infectious.
Greenbank
Sure, but at the same time, one of our colleagues is just coming to the end of his third bout of Covid and only found out he had it because he was PCR tested as part of a study. He had symptoms but 5 neg LFTs across a week after symptoms began. Then he had the positive PCR and continued to test neg on LFT.
I know that LFTs are effective, but they are not perfect.