I think it is very much valid if the entire context is taken into account. The tower is used for various stacking and craning operations between launches. Ther

I think it is very much valid if the entire context is taken into account. The tower is used for various stacking and craning operations between launches. There is a better chance to detect any developing anomalies outside the launch context. Also, being on Earth and flying nowhere, it can be sturdier and heavier than any flight hardware. Much like Roman aqueducts, it can be overbuilt a bit to ensure some extra resilience. Plus, more towers at the same site, as you say. If one malfunctions, another one can act as a backup. In contrast, every single landing leg is a mission-critical component and cannot be replaced in-flight by another one.