Some straws even come with the brush!

I much prefer them. For one, I feel like they feel as cold as the drink, which is highly satisfying. And for two, I find the texture of plastic kind of nasty, as well as the thought of whether I am consuming microplastic particles through the straw

Just pop them in the air fryer for a minute

You can get plastic, glass or bamboo ones too. Actually, the metal ones I have come with a little silicon extenter on the end :).

Yeah I do agree about the fruits, that is a little strange. Fruit would probably sit somewhere between veggies and beans. Maybe they just average it?

I think it's just the issue of trying to simplify things. You can endlessly get into the details and end up with a monstrously complicated and useless infographic that is technically accurate. For example, even in the category of vegetables alone - carrots are technically more like potatoes, but colloquially still seen as a vegetable. And corn, despite being a grain is nutritionally more on the starchy side making that also more like potatoes.

But if the graphic reflected all that, the basic idea would get lost.

It depends wildly on the fruit and vegetable. For example, cabbage is about 0.25 calories per gram but carrot is 0.36, and strawberries are 0.32. An apple is 0.5. (All numbers from Wolfram Alpha).

Lulz. I would not recommend a diet made of purely vegetables for a prolonged period of time.

It often doesn't work in the sense that people try to achieve a calorie deficit by eating less, which causes their appetite to increase significantly. Many people are unable to resist overeating in our industrialized societies that constantly bombard us with addictive foods. So yes, a calorie deficit is necessary, but it's also necessary to have a way to deal with appetite or else maintaining a calorie deficit becomes unsustainable.

That's why plant-centric diets are a great choice - you can eat as much as you want to satiety, and still be able to lose weight.

How many calories would it take to digest a litre of lettuce smoothie?

A lettuce smoothie is not the same thing as eating lettuce. By turning it into a smoothie, you increase the calorie density and make it much easier to consume a higher quantity faster. That is likely enough to turn it into a higher calorie food.

I do that every day, my friend, with a special drink I made called a Baja Blast on Ice.

That's one part Baja Blast.
One one-fifteenth part ice.
One one-one-hundredth part brown sugar.
And one one-fiftieth part lime slice.

No, obviously I'm talking about meth.

(Assuming this joke won't land: technically methamphetamine has calories.)