Sleepless Dad (been there) Yes, they do have relevance today, just as guidelines for living and co-existing. Pick any flavour you fancy, read the book yourself, make your own mind up.
It is those 'teachers' that get up my nose,who preach that they alone know the way, and you won't get to a good next life unless you follow THEIR swerve.

You will not go to (insert choice) if [a] you eat meat on Friday/ [b]mix different threads in your clothing/ [c]accept women as equals/[d] slaughter animals et al et al...