NOT true. Most of what you posted is correct FOR STREET cars, but the OP did not say. For track use, or even a hot street / strip car that is "only" street driven occasionally, there might be a good reason to remove vacuum advance........
TIMING ACCURACY. Many factory distributors don't hold timing accurately BECAUSE of the advance plate wandering around "in there."
For some of these guys, who aren't "street cruisers" vacuum advance is not relevant.