Stupid ancient geniuses

i never get to understand what is wrong with those old matematicians/physicist/chemist/whatever. Why must they make simple things so complicated just to be famous? 

For example: 

1. Why must accounts seperated into penyata pendapatan and T-form to do? Can't we just do it 1 way? 
   
2. Why must some stupid chemist make some stupid formula to calculate the relative molecular mass ( average mass of 1 molecule÷ 1/12 x mass of an atom of carbon-12) since we know that mass of an atom of carbon-12 is 12 unit. Therefore when multiply together, it will still be average mass of 1 molecule ÷ 1. Besides, there must be different names for the same thing such as relative molecular mass and relative formula mass which the only differences are between molecule and ions.
3. As for physics, why must they have so many names for the same thing? For example magnetic field line = magnetic flux = something else which i forgotten.
4. Biology is the worst. There are so many scientific words for each organism that is so complicated and not that we are using them in our daily life. Imagine us saying " Hibiscus rosa-sinensis is our national flower, " or " I love to eat a 12-inch Musa acuminata ( banana ), ". 

In short, these old freako scientists/mathematicians/whatever  are making our life complicated ...