Is your gripe with saying Trump will lose because it weakens his chances or actually believing Trump will lose?
I am not calling the election either way, yet. But Trump could lose, your gripe seems to be with saying he will lose, because this country has crossed a rubicon. Well over half this country makes its living over the remainder. That majority plus owes its living to the party of government i.e. the Democratic Party. Everyone who insist Trump will not or cannot lose will help him lose.
Elections are not won via the “Think Method” or the “Power of Positive Thinking”. Believing in the inevitability of a Trump win will not make it so.
If you support Trump then understand how he could indeed lose this election and help prevent that from happening. As it stands this will be a very close thing.
You can support Trump and still think he will lose.
The issue of concern will be possible massive voter fraud. That is why it is going to be very important to use smartphones to detect possible voter fraud.