Socialists use work and labor to describe different things. Work is the set of actions a worker is coerced to participate in by capitalists to align with the interests of capital. Labor can be something you engage in as part of work, but that's not always the case. Sometimes people have jobs that are so inefficient or bullshit that they literally don't labor at all at work (read Bullshit Jobs).

Labor is necessary (currently), work is not. Aligning with the interests of capital is not synonymous with the interests of humanity (think ad work, literally encouraging greater consumption, especially around harmful products like tobacco/alcohol/sugar. Most western countries now have bans on tobacco advertising, but still let advertising in general flourish).

On the topic of feeding everyone, it would be very logistically difficult in the 1600s no doubt. Now we have a massive international trade system, I can easily get massive amounts of goods shipped from the other side of the world in weeks or maybe months at the worst. We also produce enough food currently to feed 12 billion people, and that's with our incredibly inefficient system of converting edible plant matter (mostly soy) to animals.

The issue is, under capitalism, poor people don't deserve to eat. If they lack money, they're better off dead than alive and consuming resources without paying for them, so that's what the global international capitalist system does, it moves more than enough food great enough distances to feed everyone as it is. It just moves it to the rich countries where obesity has been a massive issue instead of the global south, because people in rich countries have the money to pay for food, and so they deserve to live (and overeat/waste food) but people born in Africa deserve death.

Capitalists often lose sight of what an economy is for. An economy isn't something of value in and of itself, it's about setting up incentives and systems to benefit humanity. Capitalism fails to do this in everyway that is uniquely capitalist. Anything it does right is attributed to the general functioning of markets, which existed before capitalism and can exist after capitalism (market socialism is a real thing). There are problems with markets no doubt, but capitalism really has no redeeming qualities when compared to market socialism. If you compare it to feudalism, it does do better at mobilizing productive forces, of course at the massive detriment to workers.