Not all generous people have ulterior motives, but there are plenty of people out there who prey on vulnerable people. Why? If you are dependent upon them, you won’t leave. They get to be both your savior and your captor. You don’t have to turn down anybody’s kindness but be really clear-eyed about it.
Sometimes we’re in too deep to turn down any act of generosity, but it is always disempowering to be rescued. When you’ve been vulnerable, few things will bring you joy like learning to stand on your own two feet.