Why do floating-point numbers even exist

http://ta.twi.tudelft.nl/nw/users/vuik/wi211/disasters.html
Why is it so hard for CPU-making Jews to implement fast arbitrary-precision arithmetic or at least fixed-point numbers?

Most of these errors sound like somebody hasn't read their http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html​. I blame “education” that introduces floating-point numbers using scenarios in which they are the absolutely wrong data type, like monetary values.