God bless this young man!
Apologies are due to those who feel insulted by lowering the opinion of foster parents. Of course, one expects there are foster parents who do right by kids without biological parents.
Looking at it statistically, in terms of segments or proportions of the whole, the motives of foster versus adoptive parents produce different experiences.
Foster parents are paid by the state whereas adoptive parents are not.
This difference in motives does not mean foster parents are less capable parents, it means the experiences can be statistically different.
We should expect to find some foster parents who are rated very high. But looking at the two groups foster and adoptive, we expect the different motives to produce differences on average in ratings when evaluating the groups.
God bless this young man!