421C,
How does a pilot with an en-route IMC qualification get safely position himself or herself for a visual landing if cloudbase is below MSA? In practice this would seem to mean TAFs forecasting cloudbase of at least 2000 feet, to ensure it doesn't actually go below 1000 feet, in which case why bother with the IMC rating? You can comfortably fly VFR below cloud.
I don't think there's any such thing as "virtually certain VFR" at the destination, not in the UK at any rate, unless the weather is so good as to make the en-route IMC qualification irrelevant. The "chocolate teapot" analogy seems pretty apt to me.