I couldn't disagree more.
As companies grow/change, existing structures that used to work at some point, can start to break down and a reorg can (and often does) solve that.
A typical example are smaller companies that start with centralized services that support all BUs, but that break up these services as they grow, because per-BU needs might diverge too much or because the distance/sense of ownership of a central group doesn't always align.
It doesn't always work, but I've seen it done right multiple times.