Broccoli has 2.8g of protein per 100g. Beef has 26g per 100g, and chicken has 27g. If you're trying to get protein, broccoli isn't going to do much, and I think it's good that the government is being honest about that. A chart that listed broccoli as a major source of protein would be misleading. Broccoli is a good source of many nutrients, and the chart calls it out as such, but it is not an effective source of protein.

> I guess what I'm lamenting is the missed opportunity to highlight that many vegetables e.g. broccoli are an excellent protein source as well as other important nutrients

I can see why you would expect something like that from this administration, but surprisingly the linked webpage seems to be based in fact.

Broccoli are not an excellent protein source from a dietary perspective.

I like broccoli, but you’d have to eat around six pounds of broccoli to cover the recommended daily intake of essential amino acids.

It’s harder to get the target 1-1.6g protein per kg from vegetables, unless you’re consuming beans/pulses which are also high in carbohydrates. Broccoli is not a great protein source, an entire head will give you 10g at most – the average adult would have to eat a dozen+ per day.

You have to consume a very large amount of lentils to make up a healthy amount of protein per day. It’s something like 6 cans of chickpeas vs two chicken breasts per day. I believe you also don’t get a complete amino acids panel like you would with meat which is complete on its own.

Most protein rich vegetables are legumes and beyond this are also rich in complex carbs. Legumes are in the top 10 food allergies. Not to mention the amino profile of vegetable sources isn't very good.

those are terrible sources of protein.