Don’t ever secure your bike to a roof rack via the forks.
Very bad idea.
Slight scaremongering there. Been doing it for years. It’s fine. Just use a little judgement when tightening up.
Quick note on BMW (OEM) Roof Bars and Thule Bike Carrier compatibility though, the metal loops which are used to secure the carriers to the bars will not fit BMW Bars because they have a deeper cross section than Thule’s bars. You can purchase adaptors…that actually slide into BMW bars, though it necessitates cutting the rubber. But it sticks another tenner per carrier onto what’s already a pricey system.