Why doesn't the IARU HF Championship have digital? "SSB and CW are good but there is a third discipline that is equally important. Just curious."
If WRTC were done hunger games-style...
a big pile of radios, cables, accessories, computers, keyers, paddles, microphones, tower and antenna aluminum, plus your desired RTTY mode equipment (let's say, a Model 28 Teletype!) - that the competitors have to battle for to build their stations
... the contestants would grab the CW stuff first and battle most vigorously with the competition to get the CW equipment. They would then grab the phone stuff but there would not be a lot of competition for it. RTTY? They would just leave the RTTY stuff behind.
Yeah, sure, some poor guy from some hick district would be stuck with no paddles and he would get the cast-off Model 28 and RTTY stuff. He would perservere with the contest, nevertheless. Maybe he'd even figure out how to whistle a bird song that was a RTTY CQ and his callsign/exchange.