I don't think you are quite following this. The company isnt aiming to limit its own ability to achieve its political goals, it's limiting the ability of employees to promote political views while acting officially as employees.

Also I have never in my lifetime of working with many libertarian programmers heard anyone aggressively push their libertarian views in a way aimed at changing a companies internal politics. Also never heard a conservative or even really a traditional Democrat do this.

This is almost strictly a leftist thing.