Self-worth should not be based on grade point averages, looks, material possessions, etc. It is unhealthy and unfulfilling to seek self-worth in such things. It is also rather childish to seek self-worth through the practice of insulting others. A lack of self-esteem is often characterized by the desire to bully or insult others without being provoked. It is rather small-minded to believe that you could successfully judge someone's view of himself or herself by merely knowing their major. It is equally ignorant to believe that all science majors behave in the same manner and have the same intellectual abilities and interests.
The world of the pre-medical student is quite different from that of other science majors just as the world of the English with Teaching Licensure major is different from that of the Comparative Literature major.
Despite your discipline, the desire to attend graduate or professional school often requires that one be focused on excelling.
Unfortunately, a form of standardized testing that fairly assesses the capabilities of each student regardless of circumstance has not been developed and grades are often important when applying to the above-mentioned schools. I believe that all students desiring to participate in a professional or graduate program would have the tendency to be focused on grades and feel the stress associated with the uncertainty of acceptance. These issues are not limited to one discipline. How many times have you heard complaints about grades and the LSAT from those applying to law school?
No one person in any major can be judged based on the actions or attitudes of his or her colleagues. There are snobs, losers, jerks, etc. in every major. How many music majors snub individuals that do not appreciate classical music?
How many political science majors belittle individuals based on their party affiliation or their lack of knowledge concerning current events? The idea of snobbery is not confined within the walls of a laboratory. I admit that it is expected that someone in a particular field would have knowledge of certain concepts and that some concepts can be quite hard to grasp because they do not appeal to our common sense.
However, all science majors do not expect everyone to have the periodic table memorized and do not think less of those who detest organic chemistry (actually, many chemists hate organic). We would hope in return not to be judged for our lack of understanding of the symbolism contained in the works of William Faulkner or of the exact nature of the economy (I know that recession is bad, but don't ask me to explain it.).
You failed to defend the intellectual difficulty of other majors in your hurry to judge scientists. Every discipline requires memorization of basic concepts.
Do you think that you were born knowing how to multiply or spell? Science, like most disciplines, requires knowledge of fundamental concepts that are necessary to truly analyze any problem. As far as I know, the Nobel Prize is not awarded for regurgitation.