One word, fiber. Fruits have fiber which prevents excessive sugars from getting absorbed in our body.

Refined sugar is devoid of fiber and gives you the entire dose spiking blood glucose levels.

BTW fruits means fruits. Not fruit juices. Fruits juices fall in same category as refined sugar as it doesn't have fiber.

Yes they are standardized and default ports. However many a times things aren't run on default ports.

Most of the standardized ports are below 1024. These are called privileged ports and only an Administrator can open them. This is additional security to make sure that a malicious user for example cannot run a webserver on port 80 to hack users.