Your source does not support your thesis. All of the professions with the lowest rates of divorce require high levels of intelligence but they’re not all very well paid. Clergy certainly aren’t and veterinarians generally have other, much better paid options. Looking at the low end of divorce professions it looks more like a combination of intelligence and systematic thinking being protective against divorce. The only people on the list that might not have degrees are Military Enlisted Tactical Operations and Air/Weapons Specialists and Crew Members and Graders and Sorters, Agricultural Products. I’ve no clue about the second but the first seem very likely to be the kind of people who do very well on the ASVAB and get assigned to nuke tech or aircraft mechanic.
The highest divorce rate professions aren’t particularly well paid by any measure but there are plenty of other professions with lower pay and lower divorce rates.
Clergy are such an obvious and well-understood exception that it's intellectually dishonest to use them as a counter-example.
Also veterinarians make extremely good money. Nearly all of those low-rate professions are well paid and virtually none of the high-rate professions are.
Everyone who chose to become a veterinarian could have made more money, by going to med school, law school, pharmacy school, getting an MBA, etc. No comment on the non-degreed, not particularly well paid group that’s highly selected for high intelligence with very low rates of divorce?
The highest divorce rate professions aren’t particularly well paid by any measure but there are plenty of other professions with lower pay and lower divorce rates.