Advantages of the IT system

Compared to TN systems or TT systems ("earthed systems"), the IT system ("unearthed system") is a system type that is rarely used, even though in many cases it would be the better alternative.

Why do we then settle for worse alternatives in practice?
The answer appears to be the following: habit, convenience, ignorance. The IT system is not very well known in the field. In fact, this topic is barely touched upon in universities and during apprenticeships. As a result, the earthed system has been established as standard and continues to spread.

The IT system is rarely used and when it is, it is mostly in applications where its advantages cannot be waived. This is the case in, for instance, operating theatres and intensive care units or in railway signalling technology. Why? Because here, human lives are at stake. But isn't it always about human lives in power supply systems?