doing a deeper dive on Chitin - I don't think any of the scientific studies on it are that conclusive Chitin is abundant in a lot of seafood too and cultures that consume a lot of it (Japan) have some of the healthiest and longest living populations

You can have the same amount of protein but if you are missing essential BCAA proteins then you can't make the proteins your body needs. See the "What I learned" YouTube videos on protein.