Precision for what? Knowing their cron job will fire? Knowing what was wrong with the commands they sent? Neither of those are crazy precise or ambiguous statements?
The only highly precise thing that needs to happen is the alignment of the antenna but that system has been working for decades already and has been thoroughly tested.
NASA tends to be pretty straightforward when talking about risks, and if they feel like all the systems are in working order and there's a good chance we'll be back in contact with it, I think it's worth talking them at their word.
Like yeah, it's impressive they can aim an antenna that precisely, but using stars to orient an object is a very very well understood geometry problem. NASA has been using that technique at least as far back as Apollo