However, for many people who are only in it for the money and do the minimum necessary additional exploration in the domain - if they find that they need to switch technologies or domains they may not have practiced enough to be able to make that switch in a timely manner.
On the other hand, people who continue to explore outside of the "this is what is needed to do my job" will be more likely able to adapt to a new stack or show to a interview panel that they are able to change to fit the needs of the organization.
I care about my income, pick good jobs and negotiate my salary. I also care about technology, and care about the quality of the product I work on. I don't care about "family" or whatever.
If you're in tech for the money, and the money dries up, you'll leave. That was my point. I personally work in tech because I enjoy technology and I enjoy software development (the money helps). I don't think ill of someone who is in it for the money, money is important. That said, if you're in it for the money, and you're not in-tune with the industry (or trying), I won't shed a tear if you have trouble staying in it during a down-cycle.
I do think ill of managers who are in it just for the money and don't care about anything beyond their middle-management fiefdom. I've worked with plenty of them, and I enjoyed working with none of them, and I think they've all had a bad affect on the success of the business (especially at scale).
"Why do you want to work here?"
Because money rocks, my dude. I'll give a nice politic answer in an interview, but I'm there to do a job.