Question about this use of the conditional form


I'm trying to understand an exchange:

A: まともに行ってもここを通り抜けるのはキツイがな

B: 見りゃぁわかるぜ

In this case person B starts their sentence with a contraction of the
conditional form of 見る, but I'm not sure why. It's my understanding that the
verb that precedes the "ば" is the "If [X]", part, so would this sentence just
mean "If I can see that, I understand it"? The subtitles translate it as just
"I can see that", so I'm just a little confused why the conditional and
"wakaruze" are even needed here.

I appreciate any help.




There is nothing wrong, incorrect or unnatural about B's comment
「見{み}りゃぁわかるぜ」. That is just a native speaker speaking Japanese like a native
speaker should be.

It is only the **_literal translation_** "If I see it, I understand." that is
making it look like a strange thing to say.

My own free translations would be:

"You can tell by looking at it."

"It only takes one look."

"Tell me about it!"

"That's for sure!"

"Obviously!"

It gets shorter and shorter.




There is nothing wrong, incorrect or unnatural about B's comment
「見{み}りゃぁわかるぜ」. That is just a native speaker speaking Japanese like a native
speaker should be.

It is only the **_literal translation_** "If I see it, I understand." that is
making it look like a strange thing to say.

My own free translations would be:

"You can tell by looking at it."

"It only takes one look."

"Tell me about it!"

"That's for sure!"

"Obviously!"

It gets shorter and shorter.

