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We can avoid most pain with synthetic food. It could also be higher quality, taste better and be healthier for humans than plants and vegetables. There's been a lot of progress in that field in this decade. Still a ways off though.

I'm not sure there's such a thing as synthetic calories and I'm not sure this is possible. Lab grown meat is another thing. It is very much alive.

Definitely exists. They are commercially available already in primitive forms, such as Soylent.

As for meat, you mention cultured meat, that is lab grown. While you're right that it's alive, it's a massive step forward as it's not connected to a nervous system.

But there's also purely synthetic meat - there's been a lot of development in this field. It's still a few years off, but they'll get there.