what would be the opposite view? that there hasn't been magnetic pole excursions before?

it's almost absurd to try and assert that, that's unfalsifiable

the evidence that it has happened, and has happened in extreme in the last 175 years is without question, to the degree of about 20 degrees - that's only a little bit less than the distance between the tropic of cancer and capricorn

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I mean if has happened how can we be so sure about the intensity and consequences of that, and what consequences it can have on eletronic devices and etc.

it's already happened, you can just research the studies and analyses that have been done just for the most recent year of solar flare and geomagnetic storms

one of the starlink satellites fell out of the sky, for a start