White latex probably wouldn’t hurt it. In horticulture, research tends to be inadequate to be definitive. With the trillions spent on human medicine and research, just a single species, research based guidelines change all the time and don’t apply to all human beings in the same way.
Excess heat might be more of a problem for some species than others. All Shigo worked with were two tree species, as I recall. I used to know what they were.