You're telling me that you can't envision a situation where Big Company A holds patents worth billions, and Big Company B wouldn't pay money to see those patent

You're telling me that you can't envision a situation where Big Company A holds patents worth billions, and Big Company B wouldn't pay money to see those patents invalidated? You're telling me that you can't envision a situation where Big Company B could spend millions (instead of billions) in an attempt to bring down such patents and, even if it loses, consider it just a risky bet at best?