In the US, it's common for folks to sell a house with a partially paid loan. Makes real-estate a liquid asset and that reduces risk. Further, it's low risk for the bank because they can always repossess the house if something goes wrong. A resident who falls on hard times can missa lot of payments before repossession can be forced. An H1b on hard times has 2 months to leave the country. This means at worst, they'll miss 1 payment before they're forced to sell the house. Much lower risk for the bank.

If you pay your monthly installments and have solid financial health (good credit score, high income, paid your taxes) then you'll get a standard deal. H1b Indians are on 30-50 yr queues for green card. Buying houses without residency is the norm, not the exception.