No one is telling anyone to be unsafe. More than almost anyone here, I openly ask about the user's the application; I expect that any good engine builder like Jim, IQ52, also asks those things first. The first response to the OP's proposed 10.8 SCR and upper 8's DCR should show that we understand the limits.
My point on the particular Wallace calculator cited is that it is based on just one parameter from thermodynamic curves and nothing else. It does not even comes close to telling anyone, new or old, everything that changes in an engine's operating characteristic with a change in CR. The fine 360 example with a small cam has nothing to do with the limitations of that Wallace calculator.