It's just my opinion that he and Chantelle would be able to do even better if they were focused full-time on dance, and at this point clearly dance is their ticket to the Olympics.
It's a risk either way. There's no clear ticket for them in dance unless Australia qualifies for the team event at the Olympics. Kerry & Dodds are currently #26 from Worlds (only 24 teams qualify for the Olympics). That #26 doesn't include a #3 team from Russia, the new Min & Eaton partnership from Korea, the Georgian junior team that made the JGPF, or any other new countries that might climb onto the scene prior to 2022. (Though the Israeli team has recently dissolved & there is no guarantee that athletes from some of those other countries will get citizenship). And it is no easy thing to climb up the ice dance ranks when neither partner started off in the discipline. Plus, you are putting your future in the hands of someone else. And while Kerry is above Dodds at home, the men are a lot more volatile. Injuries happen and it's not impossible that Brendan could make the top ten at Worlds during a qualifying season.
So nothing cut & dried about this decision, IMO.