Yes, that is the point, isn't it? (Not-- "the sky is falling, the sky is falling", like it's some kind of joke).
When, or if that (magnetosphere falling) were to occur, it would be a big problem for most all earthbound (earth dependent) live forms. End of the road, fried in place almost like being cooked in a microwave oven.
Trouble is, I (this little black duck, anyway...) can't see it happening UNLESS the planet earth were to enter into a wobbling phase not unlike a spinning top, which though at one time was spinning relatively firmly upon a single point axis of rotation (ok- there's "a little" slo-ow wobbling procession going on already) began to under go a series sudden of 'bumps' to the already slightly wandering wobble, to then veer into wide swings of rotational arc not unlike a spinning top which can undergo such things before returning to more nearly regular straight up-and-down rotational orientation.
Changes of that kind, where the rotational axis undergoes ongoing wide-arc "change" would change the flow of liquid magma (containing metals) which movement --in comparison to deep core metals-- would disrupt (I think) the generator of the flow of electrical energy (and actual electrons themselves) from the South pole, which on their way to the North pole hemispherically wrap the earth at some distance away from the earth's surface.
That is what creates (is the substance of?) the Van Allen [anti] radiation belts, isn't it? When, or if generations of that flow were to change/fail that would result in;
Not necessarily "extra" heat coming from the sun, in one sense, but more cooking power arriving on the planet's surface --For Sure.
There must be some way out of here, said the joker to the thief
Theres too much confusion, I cant get no relief
Businessmen, they drink my wine, plowmen dig my earth
None of them along the line know what any of it is worthNo reason to get excited, the thief, he kindly spoke
There are many here among us who feel that life is but a joke
But you and I, weve been through that, and this is not our fate So let us not talk falsely now, the hour is getting late
And since you are writing about magnetospheres, rotational arcs and Van Allen [anti] radiation belts I will say it again, for my part: IT DOES'T MATTER.
There's not a DARN thing you or I can do about it so why get your shorts in a bunch all hot and bothered about it?