Learn English – Do we use “would do” or “would have done” after “if it wasn’t/weren’t for…”

In dictionary,

if it wasn’t/weren’t for…:

used to say that somebody/something stopped somebody/something from
happening

[1] If it weren't for you, I wouldn't be alive today.*

It seems like conditional sentence type 2 – unreal at the present time. But I saw these in another site:

We use if it was / were not for + noun to say that one situation is
dependent on another situation.

[2] If it wasn’t / weren’t for the fireman, my dog would have died in
the fire.

[3] If it hadn’t been for my parents, I wouldn’t have gone to
university.

The example [3] is Conditional sentence Type 3, unreal in the past.

If the example [2] is Conditional sentence Type 2, then why they use "would have died" in the main clause & "was/were" in the conditional clause?

So, is this sentence wrong: If it wasn’t / weren’t for the fireman, my dog would have died in the fire.?

Because if it is Conditional sentence Type 2, then why they use "would have died" in the main clause & "was/were" in the conditional clause?

Anh here says:

but for=if it were not for

He would have played but for a knee injury. (it uses "would have played" in the main clause but it uses "were" in the conditional clause )