Then why does Google have a textbox on the app? Why not just put a blank page as their front page? And why does the textbox only suddenly move your input from a

Then why does Google have a textbox on the app? Why not just put a blank page as their front page? And why does the textbox only suddenly move your input from a web app element to a browser element in only this one instance? What solution does this solve for me, the user, to have to determine that in this one instance, the textbox can't be used, but on literally every other application out of millions of web applications, text boxes work correctly?