[gjm11]

So you're just saying: if the laws are just slightly wrong then devices built according to the wrong laws may fail but only very rarely and it may take us a while to notice? And therefore we can't say "these physical theories must be right because otherwise we'd see things failing" because the failures might be very rare?

Sure, that's correct, but no one[1] actually claims that present-day physics is known to be exactly right. For the excellent reason that present-day physics is known not to be exactly right. (Because our best theory of large-scale phenomena is general relativity, and our best theory of small-scale phenomena is quantum field theory, and if there's a way to combine those into a single theory that doesn't contradict itself then no one's found it yet.)

[1] Obviously any time you say "no one says X" you're likely to be wrong, because for any crazy thing there will be some people who say it. But no one who actually knows much about science is going to claim that present-day physics is exactly right, unless they're deliberately oversimplifying.

[nighthawk648]

Exactly... nothing further for me to contribute! Thank you for listening!