I often hear people say that native English speakers don't make grammatical mistakes. But I don't understand the use of conditional statements as most people don't really pay much attention to the verb agreements of the two clauses, specially in the case of hypothetical present and future. Here are some examples:
The worst outcome would be if Apple wins a large judgment. Read more on The New Yorker
If the NATO troops do pull back, it would leave vast areas of the country unprotected including border areas with Pakistan. It would essentially mean the end of the strategy of trying to win hearts and minds by working with and protecting the local populations. From AP.
I have heard numerous native speakers use the same structure in spoken English. Can we say this is acceptable grammatically or is it me being a bit too thick to see the thin line?