Some people go to college to make more money, some people go to college to chase a dream. I guess if you are interested in making 15-20 dollars an hour, that is cool. If you are a hardcore materialist and love money so much, you should go get a masters in business. You could with a bit of effort start a job at 80k a year with big fat bonus' every year. That is pretty close to 40 bucks an hour, without the bonus. Construction jobs usually top out at 25, unless it is a skilled job. Yearly raises and all usually just keep up with inflation. Having a lucrative career in business can mean big raises often, wide open chances to advance, switch companies and perhaps someday be a CEO of a major corporation.
Of course, there are those that just want to live, and money is immaterial. Like me. I want to write, and I know I wont make a lot of money doing that, but money doesn't mean anything to me. I am willing to spend 4-6 years of my life and 40k-80k to achieve that goal. Just depends on what your goals are.
Having a skill is very handy. Right now I have none, as I work in a factory. I get laid off, I am back to square one. Which is why I am going to go to college.
I think college is so hard for many because of the way the brain works. From birth, our learning processes create a pattern in our brain. This denotes how we think, how we memorize things, organize thoughts and often times feel about things. It also effects talent. Every thought, every imput changes this pattern ever so slightly, and what we learn growing up impacts it the most. It is when our thinking is more flexiable. If a person grows up without that flexiabilty, their brain can have difficulty in learning new things quickly. Neural patterns that are used to picking out patterns, memorizing things, or thinking outside the box excell. Those that are more rigid have more difficutly.
Of course, the brain is just like a muscle. The more you use it, the better you become at using it. The longer you don't use it, the harder it will be to get into a pattern of using it. Don't use it, it will atrophy and get flabby. Exercise for the mind can be just a challenging and rewarding as bodybuilding.
Of course the reason college has all of those "pointless" classes, is that a well rounded education allows for greater growth of neural connections, give us practice in learning, practicing in reasoning, and working our mind muscle. That and knowing things, even pointless things as so many say, can be rewarding. Think of it as isolation and compound exercises. The compound exercises may be what is important. But how many do just those, and no accessory work with isolation exercises?