They don't all teach the same things. As an example, here are the course catalogues for a BS in Computer Science at MIT and at Caltech

http://catalog.mit.edu/degree-charts/computer-science-engineering-course-6-3/

https://www.cms.caltech.edu/academics/ugrad/ugrad_cs (link at the end of the page for the course catalogue PDF; page 571 onwards in the pdf)

Not to mention the professors/lecturers, as well as the equipment and facilities also play quite the role

(Not really a typical eli5 question, I'd say)

1. Because Uber/doordash show the tips to the drivers so they can decide if the trip is worth the delivery and drive for them

2. They won't because the pay they give out to drivers per delivery is barely enough and they expect customers to supplement it with a tip

IIRC, Uber Eats allows you to add a tip later on while doordash doesn't. So mostly customers are forced to tip beforehand instead of based on delivery drivers' quality and/or speed of delivery

However allowing the customer to change tips after delivery is opening another can of worms regarding "bait and switch" tipping

The solution is for Uber and doordash to properly pay their drivers and not expect customers to supplement their pay. But then deliveries will be more expensive and customers will likely pick up their orders themselves (at least for those who can), so lost revenue. This is not even mentioning how Uber and doordash don't technically employ their delivery drivers in most areas where they are operating, thereby getting away with measley "pay" with no benefits

Looks like something out of the Lord of the Rings

"You walked into the wrong neighborhood, punk"

Indeed, especially since they're trying to promote their channel, lol