From what I have read .... you need firm contact with the cam-lobes. If the springs are weak .. the lifter might not rotate ....and will just slip-and-slide over the lobe.
Firm consistant contact can still be had with low pressure springs. This has been a recommendation for may many years. Where have you been????
Clean it, if it's Dirty. Oil it, if it Squeaks.
But: Don't fix it, if it Works!
