Do VFR airplanes have to stay in Class E airspace?

There are places in the U.S. (e.g. much of the upper peninsula of Michigan) where class E airspace bottoms out at 14,500 MSL, yet the ground is still relatively low (e.g. 1000 MSL). A. Why is that? (why wouldn't it be 1200 or 700 AGL) B. Do VFR pilots have to stay in class E airspace (assuming they're not... show more There are places in the U.S. (e.g. much of the upper peninsula of Michigan) where class E airspace bottoms out at 14,500 MSL, yet the ground is still relatively low (e.g. 1000 MSL).
A. Why is that? (why wouldn't it be 1200 or 700 AGL)
B. Do VFR pilots have to stay in class E airspace (assuming they're not in B C or D), or can they go outside of it?
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