わけじゃないよ

it's not that

→ 訳
phrase Uncommon #17,987
it's not that An informal way to deny or correct an assumption; often means “not necessarily” or “it’s not the case that.” よ adds a casual emphasis to the statement.
JA: 嫌いなわけじゃないよ。
EN: It's not that I dislike it.

僕が飾ったわけじゃないよ

I’m not the one who decorated it.

死ぬまでオーストラリア帰ってこないわけじゃないよ

You’re not planning to never come back to Australia, are you?

男の子だからトム感情がないわけじゃないよ

Just because Tom is a boy doesn't mean he has no feelings.

全ての白鳥白いわけじゃないよ

Not all swans are white.

ここはいつも寒いわけじゃないよ

It’s not always cold here.

亭主戦場だし待ってるわけじゃないよ

My husband is on the battlefield, so it’s not like he’s waiting for me.

— 鶴は翔んでゆく (1957)

俺たちがになったわけじゃないよ

You didn't get tired of us, did you?

— ザ・マン・フロム・アース (2007)

新聞を読んでるわけじゃないよ

I'm not reading the newspaper.

毎日泳いでるわけじゃないよ

I don't swim every day.