One can argue that nothing is important to most people.

The correct calculations involving money, up to the last cent, are in fact important for people who do them or who are supposed to use them. I've implemented them in the software I've made to preform some financial stuff even in eighties, in spite of all the software which used binary floating point routines. And, of course, from the computer manufacturers, at least IBM cares too:

https://www.ibm.com/support/pages/decimal-floating-point-use...

Apparently, there are even processors which supports these formats in hardware. It's just still not mainstream.