It's not "politics doesn't exist". It's that the advantages of declaring a political cease-fire in many contexts outweighs the cost of not being able to advance your personal agenda. This is especially true in many engineering and technology contexts, where creating a product that generates business value for your company is orders of magnitude more important than your political concerns. Even if you think your politics is extraordinarily important, the answer is likely to donate a portion of your salary to political groups rather than politicizing the workplace.