Last I checked knowingly presenting a false or misleading simplification, whilst not an outright lie, is deceit
Specifically for elections, this specific false simplification by denying the cyclical nature of elections can steer people away from the idea that you can punish a dominant political party in one electoral cycle when they put forward deeply unsuitable candidates to incentivize them to put forward better candidates in the next electoral cycle, something that has happened in the past even in America and is more common in other countries.
Whilst right now given just how shit Trump and the present day Republican party are, such a "punishment" strategy against the Democrats would be an incredibly bad idea, had it been used in previous elections it's quite likely that America would never have become so extremely Far-Right.
That kind of false simplification was very much the political propaganda strategy of the mainstream Democrat politicians over the last 3 decades to steer voters away from punishing them as they moved ever more Rightwards alongside the Republicans creating the current political reality in America were the politics of the present day mainstream Democrats are to the right of the politics of Roosevelt, a Republican.