Do we need to be more efficient?

I mean, it’s usually a beneficial thing. Using less resources (including land) to produce the same amount of food is probably going to mean less environmental damage. In the case of switching to vat grown meat it also means not torturing billions of animals every year.

We have the resources to feed everyone on Earth and have leftovers

Sure. No one starves because the food just isn’t on this planet, they starve because the people who have it won’t give it to them. That said, we’re also not using resources very sustainably so saying we produce enough food currently isn’t the same as saying we can continue this way.

We could also increase efficiency even further by reducing meat/dairy consumption.

I don’t eat any animal products so you can probably guess this is something I’m strongly in favor of as well!

Anyway, I was just responding to what I quoted not specifically arguing for 3d-printed foods. Depending on how it’s implemented, it may or may not be better environmentally than the status quo