Incorrect!! I've put well over 100k miles collectively on Isuzu pickups over the years (including a roughly 1200mi round-trip [2400 total] driven straight-through to and from Seattle [to, then from, not all at once], AND pulling a friend's Cadillac Sedan DeVille about 15 miles to a repair shop), without any head gasket problems. The 2.0 and 2.3 (no experience with the 2.6 I4) and 2.6 V6 in the 4x4's were notoriously bulletproof. :)
Every so often, though, you'll find one that someone beat the hell out of and blew up the head gasket on (ALL vehicles, though, will suffer from idiot drivers)... A simple fix, and if you do it right and not drive like an idiot all the time, will last forever. :)
- CK