Yes, precision is important so that people don't bend terms in their favor. But a court ruling that the summaries take precedent over the actual legal terms won

Yes, precision is important so that people don't bend terms in their favor. But a court ruling that the summaries take precedent over the actual legal terms won't happen if it's made clear that they are summaries, and if the summaries are accurate to the legal terms they're summarizing. So your fear of summary misinterpretation is unwarranted. You're overlooking the huge benefit of term summaries for both websites and users.