I think they wanted access to the vehicle, perhaps to pinch light clusters or something. Still seems odd not to smash the window, unless the geniuses thought getting in via the roof would not set the alarm off.

A local garage told me two RRS in my area had read lights removed in the last week or so.

I always deadlock my car. It must have helped here, so I recommend it. L405 P400e Autobiography (MY2020)... Silicon Silver / Espresso
RRS TDV6 HSE Lux (MY2011)... Nara Bronze / Arabica - now gone!