In around the world, there are various people with various their jobs. These days, most people consider their own jobs. This is a very good issue because most people' work can realize to choose their own works. In my opinion, i do not agree that it is unrealistic that people work at the same company during their lives. There are some instances to support my opinion.
To start with, No matter what people work anywhere or anytime. The most important thing is that people should choose their job with the preference. To decide about own jobs or works is up to own. Therefore we cannot say to people, who work for whole their live at same place, are unrealistic.
Plus, if a person is adapted with his own work, it can be easier to stay same company and also he can keep working in there for his life without quit. Besides if there is a person who devotes his work during his life, he could be respected person because it is too hard to devote on one field.
On the contrary, people who usually change their work can be more unreliable. Sometimes, when we see the people who keep changing his job, we can think that he might not be absorbed at work or concentrated at social life.
To conclusion, I am confident in saying that it is not unrealistic for people to work at the same company for all their lives.