Protein is made up of different amino acids. If a food has all 9 essential amino acids humans need its called a "complete" protein.
It really does not matter, since presumably that is not the only food you eat. You need all the amino acids, but like any other nutrient, you don't need them all from the exact same source. As long as all the food you eat balances out the needed nutrients, you are good.
It'd be like saying, apples are unhealthy because it doesn't have literally every nutrient and if you only ate apples for the rest of your life you would be malnourished. Which is true but also a silly thing to say because nobody eats only apples.
It really does not matter, since presumably that is not the only food you eat. You need all the amino acids, but like any other nutrient, you don't need them all from the exact same source. As long as all the food you eat balances out the needed nutrients, you are good.
It'd be like saying, apples are unhealthy because it doesn't have literally every nutrient and if you only ate apples for the rest of your life you would be malnourished. Which is true but also a silly thing to say because nobody eats only apples.