Yes, a win against Swansea would mean today's point was a good one. We'd be more or less safe.
But a win today and a draw against Swansea would have meant that we would have had several avenues of escape (assuming no big goal difference swings): we'd be safe with any of
Huddersfield failing to get at least 2 points against Chelsea, City and Arsenal (very likely),
or Swansea not beating Stoke (less likely but not impossible),
or us getting a point against City (less likely but not impossible).
But now if we only draw against Swansea we'll need to match or better their result against Stoke with ours against City, or get a draw against City and hope Huddersfield lose their last three. Not likely.