Answer:
If water didn't dissolve most of the substances, humans, as water organisms, with the substances dissolved in the blood and other liquids wouldn't exist.
Step-by-step explanation:
If water didn't dissolve substances, physical forces, connections between oxygen and hydrogen wouldn't be the same, so it means that the structure of the solid substances in the universe would be completely different. The law of physics would be different, and the whole universal system, as well.