kote said:
Looking at career projections over the next 5-10 years and factoring that into a choice of what to study is perfectly reasonable.
It can be, but you run into the "projection paradox."
If everyone thinks that X is going to be the hot career, and everyone goes into X, then you get an oversupply of people doing X, and then X isn't the hot career. Something that makes projections messy is that it's often the case the the projection changes the thing being projected.
One of the ironies is that sometimes the optimal strategy is to do something totally random. If you do something totally random, your odds of winning are chance. If you listen to projections, then you may end up doing worse than chance, because you get caught up in a bubble.
I studied mechanical engineering (vs physics) so that I could get started in a certain type of career, and I'm certainly very glad that I did.
I studied physics without being too concerned about career. It worked out pretty well for me. The one important trick that I did was that I had a pretty broad education which meant that I could switch pretty quickly from field to field. The other thing that worked for me was a lot of outside reading on history, politics, and economics since those are going to be the big things that affect career.
A lot of my friends chose majors without considering their options after college. Too large a number of them are now unemployed and don't have an opportunity to learn or experience much of anything. The unemployment numbers right now for new graduates are astounding.
The problem is that they wouldn't have been much better off had they giving careful thought to their major. The problem is that we have an economy with 10% unemployment, and in that situation it's musical chairs. It's not going to help you at all to pick a "relevant major" because the jobs aren't there and as long as the jobs aren't there, you are likely to end up losing whatever you do.
If everyone switches from physics to MechE, then it's not going to do people much good if the jobs aren't there.
This is where history comes in. When all hell was breaking loose, I found it really useful to read the experiences of someone that lived in the 1930's to see what they did.