Always ordering take away can get very expensive, very fast. And very unhealthy unless, again, you're willing to spend good money.

Cooking yourself is way cheaper.

Sure, if money is not a problem, have someone else cook so you spend more time on improving the product/relaxing.

For a 3 day trip, a company can afford a take out for the participants. spoken as someone who enjoys cooking tremendously

But...we're explicitly talking about a company sponsored trip. The company is obviously paying for meals.