two of those three were both fully fit just two weeks ago, while the other is back in training. for them both to get injured at the same time is bad luck, unless there was anything we could've done to prevent either injury. that's common sense, not nonsense.
Other supposedly back in training after year in sidelines and history of injuries while one of remaining two also having injury history doesn't look promising to anyone. That Jan had injury too isn't just bad luck, he isn't superman either and those things happen. Having only 2 center halves that played last season (and one of them sort of injury prone) and one that has been out for season and not back yet is bad policy.