I believe they are ready, but as it's Harris on the next page, enough voters may choose to stay home to give it to Trump.
The Dems have a problem, in that they keep choosing candidates that are just not up to the job, or popular enough.
If Harris can't be further ahead of Trump at this stage of the race, it's her that is the problem, as after all, as has been pointed out a thousand times on this forum, Trump is the worst person on the planet. If she isn't doing better than the worst person on the planet, it has to be her, or her lack of policies, or her hiding from the media/ not answering questions, or just being unlikeable.