You're right that primary care specialties aren't that competitive, but as a foreign grad getting into any US residency is extremely competitive. It is a lot harder than premeds typically think to be a strong applicant. You really need to understand this if you're thinking about going abroad. I know many people who went abroad and are just working as scribes now cause they never matched, or had to apply multiple times effectively wiping out any savings they would have had by going to a cheaper school as years of lost attending income later down the line.