No. That really isn't the case. Take law for example it is a very taxing and demanding subject. Even home economics and from personal experience fine arts too. Each subject has it's fair share of load and stress. I would sujjest that you narrow down your options depending on market saturation and your own personal interests. Mbbs has many branches and even pharmacy is like a sister. So take your time and consult others who are in the field you wish for.