That's a bit dramatic. It's a longer active cable. You can get a certified passive Thunderbolt 4 cable for 25 Euro including VAT:

http://shop.caldigit.com/eu/Adapters%20And%20Cables/Cables?p...

Short answer to the grandparent: buy a certified Thunderbolt 4 cable. They have clear markings (a Thunderbolt logo, along with the digit 4). They are backwards compatible with Thunderbolt 4, Thunderbolt 3, USB 4, USB 3.2/3.1/3.0, USB-C Gen 1/2, USB 2.0 and can charge 100W.