it doesn't matter与it is not bad他们相等吗

it doesn't matter与it is not bad他们相等吗
it doesn't matter与it is not bad
他们相等吗

it doesn't matter与it is not bad他们相等吗
1）it doesn't matter是没关系的意思；
2）it is not bad意思是“还不坏”与just so so差不多.
这两句话一般没有等同的意思用的语境也不大一样,可以说1）是用在主语对于一个事情的评价；而2）是主语对于宾语的评价.
个人见解

it doesn't matter是不重要的意思
it is not bad是没有害处的意思
例句：It doesn't matter whether you have a pencil or not, as long as you have something to write with.
It is not bad for old people to drink wine every once in a while.