Not necessarily. Many aircraft fly in overweight conditions without tip stalling. You're correct that planes with higher wing loading will not slow down for landing as well as the same aircraft with a lighter wing loading. I have flew airplanes that were 25% heaver than advertised and the still did not tip stall. If the incidende is correct, the wing is ballanced with no warps in it, it should just drop straight down when it looses all lift. No harm in trying to get the incedence right.