Yeah I mean, you don't want individual counties to be able to hold up state-wide results. Imagine how that will work: there will always be red counties in blue states and blue counties in red states. Suppose these opposite color counties always refuse to certify their results whenever their state elects someone different from who they wanted?
That makes sense, and I think the law works the same in my state, NM; Otero county balked at certifying their results in the primaries, and were told they didn't have the legal right to do so.
I don't know what's going on with Lake's legal challenge of the Maricopa debacle, but maybe part of the idea is to delay the state certification for as long as possible while her attorneys work on their legal options. Another potential delay is response that Brnovich has required from Maricopa County (although I don't believe Brno intends to do a thing.)