Animals that are intermediate hosts for the vesicular stages of the tapeworm are much more

Animals that are intermediate hosts for the vesicular stages of the tapeworm are much more affected by the presence of parasites than the final hosts. Why? What is the biological significance of changing hosts in the life cycle of tapeworms?

Animals are intermediate hosts of tapeworms. They become infected by ingesting grass, contaminated meat. The larva of the vesicular stage, matures inside the animal, ruptures, and with blood, the eggs are spread throughout the body, get into the muscles, brain, eyes and other organs, cause severe pain in the animal, blindness, and sometimes lead to death. In humans, tapeworms live in the intestines and deplete the body, taking away nutrients.

The parasite needs a change of host to get from muscles, blood and other organs into the intestines.