Is it normal in Irish to state a conditional, after the main clause?

For example, I will say “If it rains, we should take umbrellas”. And my Irish friend will reply “Only if it rains”.

Similarly with other qualifiers, I will say “Usually, he takes his car”. And my Irish friend will say “He didn’t take his car on Thursday”.

It’s as if they just don’t hear ANYTHING before the main clause.

Is that a feature of the language, or is my friend just forgetful, or am I too lax with emphasis?

Thanks

This sounds to me like ordinary conversation, where someone emphasises a point.

If it rains, we should take an umbrella.

Yes, I agree - but only if has already started raining, of course.

[This is bad advise in Ireland, where it always rains!!]