occasionally I'm sure but it's more the exception for Schengen passports. This policy long predates Trump. I've been trying for 5 years to get my Vietnamese gf and now wife into the US and so far no luck.
USCIS typically denies most Asian tourist visas unless from a richer country like Japan and maybe Korea. They automatically assume a possible overstay will occur if they have a spouse or relatives from the US. Meanwhile Europeans typically get approved even from poor eastern to European countries. This usually comes as a shock to most Americans who are accustomed to going anywhere they please
I beg to differ on a few of your points. Many Asian young women are not especially attracted to young Asian men because they're immature and typically don't have a good income. About 90% of the Philippines is composed of single moms because the young boys typically run off without consequence. Also not uncommon in Thailand and Vietnam either. The older men offer stability financial and emotional which females genetically seek out to protect their young whether they have any or not.
The land ownership thing you mention seems endemic to Thailand. I've heard it said a lot. Other Asian nationalities tend to want to involve their extended families in any good financial fortune they may get.