わけじゃない
Meanings
1
it does not mean that ...; it is not the case that
usually written using kana alone
Used to deny a possible interpretation or to clarify that something is not necessarily true. Often follows a clause in plain form. Equivalent to 訳ではない, but more colloquial.
See also: わけではない
Having money doesn't necessarily mean you can be happy.
It's not the case that everything he said is correct.