Grasses generally have higher insoluble fibre in form of cellulose and lignin and will be passed out in faeces as consumed, with little or no modification in most cases.
These insoluble fibre, if not modified would definitely lead to a host of stomach issues.. The make up of human digestive system wouldn't even support this.
Great stuff you have here @gentleshaid, you nailed your point with the required piece of information
Thanks @annieben. It's been a while you blogged stem, hope you are good?
I am fine 😊😊😊. I will, soon.