Would your highness kindly tell shallow minded people like me, what exactly did you achieve with your debate, the end result?
You're seriously asking me what benefits a debate brings us? Stand back my friend.
1-You're assigned a committee that exists in the actual UN with issues presented to you that actually exist in our world. You're expected to research your country's stance and hence gain knowledge about the country in regards to foreign policies, historical events, infrastructure, political state and what not.
2-Since it's an open debate and everyone comes having researched with their country, you not only get to gain knowledge about your own country but upto 60 more countries as everyone shares their views and perspectives on the given topic.
3-It provides a platform for those who wish to be heard and those who wish to broadcast their verbal skills. Not only does it help only the skilful speakers, it gives a chance to all those who have never spoken in an actual debate to speak up.
4-This in turn builds up confidence, self-esteem and a sense of team-work. Through lobbying, one can learn countless social skills and learn how to deal with people you've never MET before. Debating also provides you important argumentative and persuasion skills, which help you later on in life, in numerous career paths.
5-The purpose of MUN is to learn about each other country and to work together to come to a conclusive resolution. 60+ countries with different perspectives on the topic at hand coming together to pass a resolution for the betterment of the state, (in model) and you still don't know what the 'point.' is?
6-It's a competitive platform. Using your words to convince the other, to yield more and more supporters only using your intellect. It's purely a test of one's mind.
7-People who don't debate are usually extremely nervous when the opportunity to speak infront of people arises. They stutter, fidget and fear the attention. The debater on the other hand is made an effective speaker, using language in a fluent and clear manner to be understood by different audiences. No matter what line of work you choose, somewhere along the lines, you will be needed to speak infront of other people.
8-You meet new people, make new friends which is also a part of the MUN experience. Poondy/Parties too if you like.
9-Summed down to it all, it provides you insight into what actually goes on in the real life MUN conferences where the world's most important issues are discussed.
Since you asked what I personally gained, I feel obliged to outline. I've never debated before in my LIFE. Public speaking scared the living SHIT out of me. I used to stutter, be nervous and mispronounce my words. Ever since I participated in my first MUN, I've gained countless social and speaking skills that I always see myself on the frontlines of any public speaking event. I must admit, I was completely silent for the first few sessions but then I learned from the other speakers in my committee, gave it a change of posture and kicked ass to take home an honourable mention.