In data structures you learn how to properly use a data-type. You learn how to implement a hash and a list. That is knowledge that is very valuable when programing high level stuff later on.
In algorithms you learn how to construct loops and programs that run faster than they would otherwise. For instance, think about how much faster it is to search for something in a sorted list than in a unsorted list (its log vs exp if its a nested search).
Processor architecture because you want to know where those bits go, if you dont, how are you ever to truly understand pointers, variables and data structures?
Your life will be soo much easier with these fundamentals in Computer Science in regards of scalability, performance and even user design. It's not for everyone and you can certainly do without it. But what you're advocating is basically "luck". Not everyone will write plentyoffish or twitter.