Sport jujutsu isn't completely useless, fun art to compete in thou i reckon. half judo, half BJJ half point karate
Many sport jujutsu guys are also judo guys so they should have a solid understanding of throws
The SJJ guys i know from a sister-club many of them got BJJ bluebelts pretty quick
now the same club has some traditional JJ to, different set of people almost, we had a BJJ training and went on for longer then our timeslot but the TJJ guys were only 3 people so they let us, the did a halfassed warm up then they stood around talking through one judo throw, averaging maybe one throw every other minute, basically they do alotta kata and no sparring