Absolutley not! In the original Greek of Phil. 2:12 the pronouns and verbs are all in the second-person plural. And while we should be careful about reading too much into that - the letter was written to the entire church, after all - we can certainly say that it allows for corporate discipleship. If Paul had meant to command only individual discipleship, he could have more clearly communicated that by switching to singular third-person verbs and pronouns, e.g. "let each one work out his or her own salvation..."
This understanding is also consistent with the kind of discipleship Paul encourages in other places like 1 Tim. 4:12-13 and Titus 2:1-10.
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This understanding is also consistent with the kind of discipleship Paul encourages in other places like 1 Tim. 4:12-13 and Titus 2:1-10.