Because of the ticking... I've fought the damn ticking since I've had the car... If I replace all of those things, I'm sure the ticking will stop and will probably run a lot better as well...So if it is running fine now then why bother spending more money on a bunch of new parts for a "band Aid" fix, and even if you did replace the cam and lifters why do you need to spend even more money on pushrods, rocker arms and valve springs?
Don't know about a band aid fix, as I said before, I have seen no metal shavings in the last 4 or 5 oil changes that I have done on this motor.
This guy took his chances the same way and the only issue he ran into was cheap made flat tappet lifters or the used cam he put in with the new lifters.