Have you heard of the Pilgrimage of Grace? 1Pilgrimage of Grace? This was a major rebellion against Henry's move to break with Rome, the. The execution of over 200 of the participants was probably a very effective incentive for others to accept the change.
As otherothers have said, for many the 'conversion' was a matter of convenience and survival. When Mary I came to the throne a substantial portion of the population reverted very happily to the old practices.