Pat Boone appealed, and still appeals, to people who would not have found R&B appealing, because he took R&B and modified it to appeal to existing majority tastes.

Just as Chinese-American and Chinese-Canadian restaurateurs originally adapted their cuisine to local palates.

It was only when enough of the population was ready for  "the real thing" that it became popular, and that was a gradual process. Once enough of a public had been primed by the weak version, more were ready for the real thing.

Skipping steps and trying to force people to like what they aren't ready for doesn't work, in fact it produced backlash.

The same thing is happening in reverse in newly developed Asia. You will find weird versions of "western food" there, as it is adapted to local tastes, and only the more adventurous and westernized appreciate "the real thing." The tourist industry here knows it has to give most Asian tourists something more familiar.