The cast of Friends made a mark on the TV world by handling everything as group. After years of sitcoms with reports of rivalries among cast members and controversies when one co-star was paid a great deal more than others, they overcame all of that by negotiating their salaries as a cast, demanding they all get paid the same amount. That was the start of their "all for one, one for all" mindset, and they've stuck to it. So I think it fits that they'd choose to issue a statement in the same way they did everything public for the show. It also makes sense to me that they'd say it the way they did. It can be torture for some to have to share their feelings with the public after a loss, and it makes sense they may not all be ready for it. Their statement protects anyone in the group who isn't ready to grieve publicly quite yet. It helps the phone to stop ringing, which is sometimes needed early in the grief process