It's more than just the fact that pursuits take up a lot of time on the program. You'll also find most pursuiters would only ride a few pursuits in a season. In competition you would ride 2 rides if you made it to the finals. Most would only enter about 3 competitions in a season. They are extremely hard on the body and the recovery takes some time.
As for training for them, 10mile TT's are good for building the endurance and teaching the body to cope with long sustained efforts but you still need to do very specific threshold work in preparation for competition.
It's more than just the fact that pursuits take up a lot of time on the program. You'll also find most pursuiters would only ride a few pursuits in a season. In competition you would ride 2 rides if you made it to the finals. Most would only enter about 3 competitions in a season. They are extremely hard on the body and the recovery takes some time.
As for training for them, 10mile TT's are good for building the endurance and teaching the body to cope with long sustained efforts but you still need to do very specific threshold work in preparation for competition.