They aren't weak. They are just failing because they are trying to handle over twice as much power as they are designed for. You make anything work twice as hard (or harder) as it was designed to and it will fail sooner or later.

A stock WRX puts out around 160-170 hp at the wheels. Most WRX's with mods similar to mine (turbo, fuel system, intercooler, exhaust, ECU, etc.) are putting out 300 or more to the wheels. Couple that with abuse (hard launches, etc.) and they fail.

I'm not saying they are the strongest thing in the world, but everyone keeps saying how weak they are, but they neglect to look at the big picture.

And, yes, everyone has "seen a stock WRX break a transmission". But, I'm sure you can find plenty of cases where a stock Ford, Mitsubishi, or even Ferrari has broken and is still bone-stock. That's why cars come with warranties.