I can think of no less than five failed British to American TV re-visionings.
There are more than five that failed, and there are more than five that succeeded. Most TV shows fail, period. So saying that a few shows of a particular type failed doesn't mean that whole category is intrinsically unfeasible. It just means that developing a TV show of any kind is far from a sure thing. But that doesn't mean it shouldn't be tried, because if nobody tries, you don't get the success stories.