Yea, it’s not C that is crap, but that it has zero guard rails. Like blaming a knife for not having a guard… Is it a bad knife without a guard? Depends on how sharp it is. The guard is orthogonal to the knife’s purpose, but might still be important when the knife is used.
Just because something doesn’t help prevent accidents does not mean it cannot serve its actual purpose well, unless its actual purpose is safety.
Bandwidth really depends on which busses you’re talking about. Within a computer, 8Gb/s is peanuts.
Even in 2003, a single PCIE v1.0 lane could do 2 Gb/s. Today, in the end-user commercial space, a single PCIE 5.0 lane can do 32Gb/s. That’s a connection that can be external to some degree. Not even talking about memory busses and internal caches that are already approaching terabytes a second.