Sealing basement wall - ring drainage with drainage pump?

Hello,

I don’t know if my topic even fits here. It is basically not exactly insulation. But it is the same principle: it’s about the basement wall.
My construction company suggested installing a perimeter drainage system with a sump pump around the basement. An office is supposed to be set up in the basement, which of course should stay dry.
My building surveyor recommends a [weiße Wanne (Lastfall 6)]. However, my construction company considers that completely exaggerated.
Can you give me a recommendation on how to waterproof a basement sensibly but not excessively? I am not aware that the floor is particularly damp.
Thank you.

What does the geologist say in his [Baugrundgutachten]?

uh... there isn’t one. :-) the contractor (turnkey) says he’s already built in the area and doesn’t need one... I think it will be dry enough with drainage and a pump... I wonder how maintenance-intensive something like that is...

You can do it that way, but you shouldn't.

You can do it that way, but you shouldn't.

what exactly? building without a soil survey or the solution with drainage in general?

A basement without an expert report.
But of course, you can save the 1,000€, but you shouldn't be surprised if there are problems.