USB cables are a minefield, it's hard to get decent ones. IME, cost isn't requisite to performance and 2 identical cables can perform completely differently.
What I will say is a cables weight comes secondary to whether it will charge or not. A cheap 10g short cable that has an intermittent connection can waste an enormous proportion of weight from the power bank as the charge circuitry continuously restarts, and its false weight economy if you cart round a useless power bank.
I have a lot of power banks and have realised that I need to match each bank to its optimum cable with a little USB charge analyzer. It's also helps to use longer cables as they have more give and dont seem to stress the connections as much when they are wobbling about in pockets.
Unfortunately, my best and most reliable cables are the heaviest ; textile wrapped Syncwire.