Most people who can evaluate your architecture have never owned a budget. Most people who can read a P&L can't read the code. I spent eight years as Director of Development and Operations with profit-and-loss responsibility across three departments, after fifteen years writing the software.
That is the whole difference. When I tell you a rebuild is the wrong call, I am not making an engineering argument — I am telling you what it does to your operating costs, your hiring plan, and your next eighteen months. I have had to live with that answer from the other side of the table.