If people are saying something you disagree with you can just say it and you won’t be fired or ostracized for it.

But you can be banned which is pretty much the online equivalent to being fired or kicked out of school.

No USB cable has “gigabit speed”. It probably has 480 Mbps (USB 2.0 standard).

Maybe he meant a 5 Gbps Gen1 cable. That would be “gigabit speed” but still rather slow by today’s standards and won’t support DP. They are pretty cheap these days, so wouldn’t be suprising to see left over stocks being sold as charging cables.

That sounds like a dedicated charging cable. So yeah, they will (if at all) only transfer data slowly and not support any extras features like displayport.