No, they are not grammatical.
The more that foreign workers are involved in the local culture, the
more realistic their views will be of that culture.
Foreign workers develop realistic views of local culture the more
they share in its life.
Immersion in local culture develops realistic views in foreign
A foreign worker will develop realistic cultural views by being
immersed in the life of the community.
If foreign workers are immersed in local life, they will develop
realistic views of that culture.
Immersion in local life develops realistic views in foreign workers.
For foreign workers, involvement in local life goes hand-in-hand with
having realistic opinions of their adopted culture.
Immersion in local life develops realistic opinions in foreign workers.
So, what was problematic about the example sentences? Subject-verb agreement was one problem.
The other problem comes from the word immersion. Think of it this way:
The more drowned a person is, the worse.
One is either immersed or not immersed.