It is an endless battle for some when it is time to choose between what you want and what is best for you. The pressure inflicted upon by society and parents alike renders those some vulnerable to becoming mentally morose and withdrawn. Their insides that shout on their behalf are silenced into submission and what prevails is anything that is socially understandable and acceptable.
From the start of our academic journey, thoughts of becoming either a doctor or an engineer are poured endlessly into our minds. As we grow up, we discover what we're capable of and want to pursue our interests solely. It is quite easy to quell our determination for everybody. They mean well, but as we grow more, we find out that what put a stop to our hopes and dreams was nothing but hearsay. In some case, vindictiveness and watching you fail.
Living in a society as conservative as ours does not help. Even if we are brave enough not to fall for what people think is right for us—or want us to think so—the fire that brings us forward soon dies, leaving nothing but an empty being who'll do whatever is necessary to survive.
A career that is in direct relation to what we aspire to be is the right career for us. If we are not good at calculations and mathematics, we must not allow ourselves to become tangled up with disciplines such as engineering and computer science just because they have mass appeal and there's an aura of recognition about them.
Similarly, stressful career choices like becoming a doctor—or worse, something else—are ill-suited to those who want to pursue careers in writing and arts.
It can be difficult at first, convincing your parents to let you choose a major of your liking for your undergrad years. Some parents never give in. Some do. If you do not want to spend four years of your life, possibly more in other cases, do not choose something that you will later regret and then will feel the need of transferring to another program. This will waste your time and your money.
The takeaway, I guess, would be to always be bold and brave and go after the things you like. Create a whole vision for what you want your future to be like. Set your priorities and your goals and work relentlessly to bring them to fruition.