> I'm not sure what politicization of the workplace is intended to lead to.
Statements like this make me think we're not on the same page here. The workplace is always political. It can not be politicized in the sense of changing from apolitical to political.
"Politicized" has to mean then that political conflict has escalated or the political dimension of the workplace has become more visible.
In this sense what politicization of the workplace is intended to lead to is political change, that is, a change associated with the decision making in groups, or change in other forms of power relations between individuals, such as the distribution of resources or status.
> If you disagree with the shared goal then why join in the first place?
Political conflict in the workplace is in the vast majority of cases not like this. When thinking "politics in the workplace", the typical issues are around worker safety, worker compensation and benefits, the status of lgbt employees, or sexism.
A little while ago Github employees protested the involvement of their company with the ICE department of the USA government. In that case, could you simply say to the protesting employees, "Well, you must just disagree with the shared goal of the company and so you should quit". I think it's obvious that would be a ridiculous response given the complaints of the employees.