You need to rinse rice though, a lot of people don't realize that.
You do that to get the starch out and get a better result don't you? That's what I rinse my rise for at least
You don't "need" to. It just achieved a culinary effect
The culinary effect of not serving dirty food.
both a culinary choice (do I want sticky or non-sticky rice) and rinsing off contaminants (who knows who/what urinated on it even if only microscopic amounts are left, seriously)