The Good Samaritan put up the travelers in a hotel, not his own damn house. He would have been a failure as head of household had he done so, because exposing your own to unnecessary risk is a sin.

I agree with your point but just to clarify, hospitality to travelers (even in your house) was almost a sacred norm in those days and still lingers in the Middle East. The Good Samaritan was also a traveler, so that's why he used a hotel. However, these norms made sense because anyone taking advantage of that hospitality or breaching the norms would also be dealt with very seriously. You could also turn people out with due cause like Abraham kicked out Hagar and Ishmael.

Also the person at risk would usually be the traveler, not the host.

See Abraham and Lot receiving divine visitors, the widow of Zarephath receiving Elisha, people receiving Jesus and his disciples, people receiving apostles, the witch of Endor's treatment of Saul, and on the flipside the poor conduct of the Sodomites and the gang rape of the traveler's concubine in Judges.