For the same reasons the Browns might go senior. Why not see where you stack up in the senior field if you're ready for it? They already competed senior at Nationals last year and they may not want to lose momentum by only skating junior. Doing both junior and senior comps again is an option but that's a lot of work since you need to prepare two different rhythm dances (unless that's not a thing anymore with the changes to the RD?)
We may see soon enough if either W/C or the Browns get Grand Prix spots!