An order obeyed is not the same as an idea respected.

Getting compliance is not getting buy-in, and the difference shows up later. People carry out instructions they think are wrong with the minimum required, no improvisation, no ownership, and no warning when it starts to fail. The order was followed and the thinking was withheld.

When something is going to be difficult, spend the extra time on why before the what. If you cannot make the case, that is worth knowing before implementation rather than during it.