[arcticfox]

I think this is a problem if the actual net worth is significantly different between partners, not earning potential.

[dpark]

Sure, but the same logic applies. If your main concern is someone taking your money in a divorce, marry someone who has similar net worth.

[srtjstjsj]

For most people, earning potential is 99% of lifetime net worth. The vagaries of the aristoracy aren't that interesting.