But now people in these countries have the right to ask people to forget about things about them which are true
Incorrect. If the court was saying to remove the page in question, then that would be forgetting things which are true.
However, the court action is directed at the association created by Google between a particular person and a page. By maintaining this association, Google are basically stating "this is one of the most relevant thing about person X", and if what it points to is irrelevant/out of date (even if true) then the result is false.
The right to be forgotten is not about making the world a better place. It is about permitting people to behave badly without consequences.
No, it's about requiring search engines to stop returning irrelevant items about a person when asked for relevant items, and as a result causing harm. Without this law, search engines could report results which are false and do harm with impunity.