Because in the last 35 years, there wasn't an intelligent cheap robot to replace you.
@Shadow Wolf made an excellent reply. Robots will be cheaper, since they don't need salaries and so on.
Perhaps some people will cling to having a human touch, at least those who can afford it. But I'm sure most people will just use whatever is cheaper and more efficient. I mean, a somewhat related example, why do so many shop at Wal Mart? Is it their great quality, service and being ethical? Of course not, it's just cheap. Robots can't screw you over either, as some people in construction or repair do. We had our windows fitted and the guy did a poor job they had to send someone else. Both a waste of time (for both) and money (for the company). Don't have this problem with robots. They don't so as many mistakes and they don't get lazy or whatever else.
I'm just saying the world is on the verge of changing and no job is truly safe. Perhaps it's best to be prepared than just cling to past notions to make ourselves feel safe and comforted.