Anyone who thinks anything will handle a direct lightning strike is dreaming..
Very few surge damages are caused by direct lightning strikes. In this case you probably have a fire on the side of your house, and losing an amp is the least of your concerns.
There's a lot of damaging surges, caused by lightning or accidents or power company switching, which can be dealt with by surge suppressors pretty effectively. Around here it is simply impossible to unplug things when lightning might be near by. Storms can roll in suddenly when I am away from home and a lot of my equipment isn't audio but work related. The usual network and computer infrastructure a remote worker needs.
From a personal perspective a couple of times when I've had my Furman with LiFT and SMP out of the loop I noticed it. Things were better with it in.