I agree with pretty much everything you said. I believe organizational structure can have an affect on the culture, but I think it’s mainly there to define the goals of the employee. Depending on the structure, the employee will be able to map out his/her advancement in the company and that would consequently affect their motivations. The work culture is, as you said, the determining factor of the majority of the culture. If the work environment is good and welcoming, and the structure of the organization is suited for advancement, these two will lead to an overall better work culture

– Saad Ali