1960's Jean mind-blasted Juggernaut through his helmet, a feat which even though much-valued Xavier could not perform!
1960's Jean even went up against Magneto blasting him mentally through his helmet, but he sneakily had employed gas which knocked out Jean.
Jean does have mental bolts, always has, always will but she just chooses not to destroy someone's mind, unlike Emma who has no scruples, never has, never will.