Define "smart". And explain how "smart"=="conscious"

I can agree that there is no genetic benefit to being able to move at the speed animals move, because that's not how plants obtain food or avoid being eaten. Thus no need for nerves or a CNS to coordinate movement.

Take either of them and tell me why nature would have optimised for that rather than other features, like leaves. Energy isn't infinite so genetic changes optimise for easier-to-achieve ends rather than somehow jumping past all animals to evolve smarts or consciousness without evidence of many precursor adaptations.

Also why would a smart (or conscious) plant not have eventually learned to use some of that to do something that improves survivability. Like strike out, or hide down, or anything more than "somewhat grow towards the light or nutrients over time".

It's a nice fun exercise to argue with people while imbibing your drug of choice, but it's utterly unlinked to anything else we see in nature. We're not idiots, we would have seen evidence by now.

Right, but intelligence/smarts and consciousness are not the same.

See my sibling comment. Neither give any benefit over just sitting there and being a plant.

It is not clear if there is a evolutionary benefit for human to be conscious. Although here we are…