I used to work for an insurance company (not actually on the claims side), but it was said how it does not take much to write off a modern day car.
The complexity of the safety systems, sensors, electronics etc are very expensive to replace in hardware terms plus the labour to install, re-calibrate and test etc.
It is almost like the main physical bodywork damage comes second in terms of cost to repair.
In this instance, I agree, it is highly unlikely this is write off territory, but what an unfortunate start to owning this new GTI, I cannot believe this was done intentionally too.