RCA has a fair point, if intemperately expressed. We should all take what we consider appropriate measures to reduce the risk of bike theft. The "the insurance will cover it" attitide *does* stink.
But we all have to make a judgement on the balance of risk. If I thought like RCA, I 'd never do the miles that I do. And I think if that *was* my world-view I'd regard bike ownership as more hassle and worry than it's worth.
Fortunately, it isn't, and I don't.