They really haven’t. Occasionally we have had some poor editorial and writer decisions to show some kind of consensus but generally that has never been the situation outside of specific controversial eras.
The era immediately after Secret Wars which was never really addressed to anyone’s satisfaction has been all but forgotten.
A mutant cure has usually been presented as an option for scared individuals and sold to the public by unscrupulous and often corrupt politicians, not reasonable or normal people.
Over and over again the implication is that extremists can hold sway over the nations they have managed to sway to their will.
To paint everyone in the MU as a mutant hating bigot is to totally misrepresent the stories we have all been reading for years. Hickman isn’t doing that and neither should we.