Absolutely. The protein deficiency myth was created by accident and used by the animal ag industry to justify addiction to meat, and to continue their highly profitable businesses. There’s a lot more money to be made from a cow than from the plants the cow eats.
Cows are the most popular source of meat, yet cows are 100% herbivore. They only eat plant-based foods and they have no problem growing all of the protein consumed by meat-eaters.
Humans are biological herbivores, but we’ve adapted to be omnivores, meaning we can eat pretty much anything. However, we’re perfectly capable of getting all the protein we need from plants, especially now that we understand the plant based diet so much better.
Here’s a great article on the topic of protein and plant-based diets: The Protein Myth.