I don't think the majority of belief systems/religions are designed to make sense lol, that's what people don't understand. Astrology isn't supposed to make complete sense either, and neither do the majority of religions, yet people cling to them fervently.
Having a religion or belief system opens up your creativity, and motivates people to find purpose. People pride themselves off of science, credibility, and thinking they are intelligent, when in reality the most intelligent people acknowledge that for every fact you learn, there are infinite more facts you don't know, and focusing on what you do know prevents you from learning.
Consider religion and other methods of belief as mediums of respite, since I can guarantee that almost every person on the planet will go through a period in their life where they question if their existence is worth anything. Also to all the atheists who can go through life without believing in God or feel the need to question on that level, you only don't believe in god mostly because there are idiots out there who believe in god incorrectly, or due to indoctrination, so your belief in disbelief often time stems from a rebellious attitude, which although is quite necessary and respectable, it is still a belief that gives you comfort, and considerably is still a (progressive) religion.