Positioning: If they can’t see me, I can’t see them. If they can’t shoot me- I can’t shoot them. Trees will block their view (mostly, since a lot of high BR planes have thermals and will see even a single pixel of heat through any forest I can hide in), and hard cover means I cannot fire missiles at them, since, you know… My missiles will just hit the hard cover. That doesn’t take into account them dropping F&F munitions from directly above me and changing direction, which means I’m basically right in the open for the bomb while they are now hidden behind the hard cover.
Radar: a single blip on their RWR will let them know I’m there and the general direction of my position. And, again, they often get high zoom targeting pods with thermals, and while I have to visually scan the entire sky from treetop level up to 12km or so, they only have to look at few popular spots since not many locations provide cover for SPAA from getting snipes across the map by enemy tanks
Deployment: Yes, I can move. Yes, I can deploy smoke. Doing both kinda defeats the purpose of either, since moving out of smoke means I basically just popped a giant flare that says “I am here” while losing the cover the smoke provided. A moving target is also much less likely to be mistaken for a destroyed vehicle, and many SPAA, especially SACLOS ones, cannot fire back while on the move
Firing: I’m gonna be dead serious, this one genuinely sounds like sarcasm. “only 10km away” must be a joke because for many SPAA that’s genuinely the max range of their missiles in a straight line, not accounting for any course corrections, all while giving the enemy almost an eternity to spot the line of white smoke moving in their direction, both warning them of the missile and showing them your exact location. If they have F&F weapons they can just lock onto you, fire, and start flying the other direction, and if they don’t… they can just start flying the other direction, both of which result in you having to perform miracles to guide the missile at such range since missiles start overcorrecting by a lot at such ranges and it feels like trying to point towards something with a wet noodle.
The only part that sounds serious is the “it’s a hit” part, since you’re might just barely get the missile into fuzing distance and will just get his wing yellow with a nice “hit” appearing on your screen.
And all that is if we only consider a scenario with just one aircraft in the air, without any planes coming in from other directions or helicopters just barely poking out from behind mountains