If a person pays attention to the cutting pressure of a plane it is down and back against the blade. So on a Bailey, if a person just snugs the screws that hold the frog on the frog can still be moved. The downwart cutting force keeps the frog from lifting and the frog adjusting screw takes the backward force. And the frog design of a Bailey is parelell and not down on an angle like a bedrock. If the screws are just tight enough to allow the frog adjusting screw to turn, the frog can opened and closed without removing the blade or lever cap and the blade does not need to be re-adjusted like a bedrock does. The reason for the popularity of the bedrock flat side style is so the frog can be adjusted without loosening the lever cap and or removing the blade. But the blade does need to be readjusted, but not on a Bailey.
The problem with most people is that if a screw or bold can be tightened, it wil be tightened to the limit of what the person is capable of. and not what is proper. Usually even torque wrenches are tightened with a jurk and way over done. I find that even the levercap is over tightened on most planes that I pick up. I know I have again touched the sacrid cow, but hopefully one or two will dry it.