You wouldn't get 1,600kCal if you chose 3 serves of full-fat yoghurt, since that's 1,307kCal on its own, let alone all the other stuff.
Overall, the guidelines I posted, depending which foods you chose, could get you anything from 1,800-2,200kCal generally, or 1,700-2,300kCal if you really tried hard. I can't see it being 1,600kCal unless you were ridiculous and all your "vegetables" was just lettuce and your fruit watermelon, etc.
I should add that most dietary guidelines allow for 0-3 "discretionary" serves, by which they usually mean junk food and booze, but which can also be foods from other groups. For example, a runner could increase their grains, a lifter their meat/fish, and so on.
In either case, the exercise guidelines would be burning some energy, too. It does indeed seem a lot of food, because in the West we're used to energy-dense food like chips and chocolate, but of course 200g of chocolate and 200g of vegetables or meat are very different things.
For example, just now I had an afternoon snack with 300g fruit (orange, nectarine and strawberry) and 200g Chobani yoghurt. The yoghurt has 115kCal, and the fruit 120kCal, or 235kCal for 500g of food.
This is about the same calories as a 51g Mars bar. It is physically easier to eat a 51g Mars bar than 50g of fruit and yoghurt, but it will have less vitamins, minerals, and fibre. So if a person's used to eating highly-processed and packaged food, it'll take them a while to get used to eating fresh food - it's just physically a larger volume.
I'm in favour of gradual changes. With the people in my gym, I usually advise something like this,
Fortnight 1 - oats for breakfast, rest of the day the same
Fortnight 2 - alternate oats and eggs & toast
Fortnight 3 - continue oats/eggs, and have 2 pieces of fruit for morning tea
Fortnight 4- oats/eggs for breakfast, 2 pieces fruit for morning tea, now add lunch with a 200g piece of meat or fish
Fortnight 5 - oats/eggs for breakfast, 2 fruit morning tea, lunch of 200g meat/fish adding 2 cups vegies or salad
Fortnight 6 - add a cup of water to each meal
I don't find I have to say anything about dinner, if they get breakfast, morning tea and lunch right, the rest falls into place. Notice I haven't excluded anything, if they want to chug down a pint of beer with their oats, that's up to them. But they tend not to; good habits force out the bad without our saying anything.