Why does he need to make media statements about his plan after the post-season? He notified Goorj/BA and I'm sure he's had post-mortems with his coach/etc. Doesn't really owe anyone else much. I'd bet the Atlanta series was all a deer-in-headlights experience he'd hate to continue in public. He made comments about his performance, acknowledging it at the time. He's likely embarrassed.
From an article:
Despite the tight schedule, Goorjian said he spoke to Simmons himself five weeks ago and his manager just two weeks ago, and both reaffirmed the NBA star's commitment to the Boomers.
For the talk of flip-flopping, the timeline was roughly:
mid-April Goorj speaks to Simmons, who is apparently keen to suit
early-May Goorj speaks to Simmons' manager, still confident about suiting
June 21st-22nd Windhorst tweets Simmons is doubtful, likely to focus on off-season training
June 28th Simmons notifies BA
The ??? is the Atlanta series followed by all the trading block talk. It's not like he had no major career/life challenge between last indicating he'd suit for the Boomers and then deciding otherwise. If I had the June he had, I'd take a hermitic turn and go hiking in the desert for the rest of the year. Would easily take me a week to make a career decision.
Seems clear that Simmons doesn't have that Boomers calling like Mills (as an example) does. That he doesn't stray far from a comfort zone. Without the passion, there's no significant pro-Boomers impetus - bigger factors would be agent, employer, etc.