Valid complaint, but maybe not such a great reason. It gets worse when you deal with sysfs or procfs and similar. It all becomes obscure magic, like what valu

Valid complaint, but maybe not such a great reason. It gets worse when you deal with sysfs or procfs and similar. It all becomes obscure magic, like what values can be written into what file, why some files aren't readable, or the contents of files being just a bunch of numbers which you have no way of interpreting. Another problem is that there's way too many of different file types and they aren't organized into any kind of hierarchy or any other meaningful order. This makes tools like rsync extremely complicated, with loads of footguns and still not solving the problem well. It feels especially bitter because in exceeding majority of cases you don't want tools like rsync to deal with named FIFO or device files or sockets etc. but you get accidentally but painfully bitten by them every now and then.