Why does Gulliver allow the Lilliputians to control him in Jonathan Swift's Gulliver's Travels?

When
Lemuel Gulliver is shipwrecked, he washes ashore on an island and then falls asleep. When he
wakes up, he has been tied down with ropes on numerous parts of body. He learns that this is the
land Lilliput, where the people are only six inches tall....