If you live where growing season rainfall amounts to 20 or 25 inches, you might say that tomatoes do not need much water.
If you live where growing season rainfall amounts to 2 or 3 inches, you might say that tomatoes DO need a lot of water.
Anyway, Texas A & M says that tomato crops have relatively high water needs. [url=https://aggie-horticulture.tamu.edu/publications/veghandbook/chapter4.html]click & scroll down to Table IV-1. Relative Vegetable Water Needs[/url]: 20 to 25 inches.
We are each other's harvest; we are each other's business; we are each other's magnitude and bond. ~ Gwendolyn Brooks