They already are. You just can’t hide decorations.
Also, people need to separate bushes from this conversation. We all know Gaijin aren’t going to let us remove them without major push back because it’s a major P2W feature. If you want to start that conversation make another thread.
So what I’m understanding is that you actually don’t care about realism and just want to disable things you don’t like (nothing wrong with that by itself, issue is when you try to disguise that as “realism”)
Just because one random guy tossed a body pillow onto a tank doesn’t make it historical. How players display them as a fixed feature attached to the vehicle is completely different to someone who simply tossed it over the turret for a silly photo. They’re not going to drive around with it on.
The same with these fireworks, signs, etc. If it was realistic the moment you’d start the battle the body pillow would fall off thanks to gravity.
Bushes aren’t big advantage, they are rather emotional support and sometimes make tanks uglier. Do they can help… rarely, in some places if you can cover very well. They are historical apart from banana leafs on winter map.
main advantage of bushes is the sheer volume they take and how easy it is to stack them.
You can use them to cover weakspots or extend a tank’s silhouette beyond the actual tank.
And ofc, it always grants an extra nicks of time because the attacker has to now make a quick process on top of spotting the enemy of culling down “what is this?” and then take a brute guess where the weakpot is (made harder by not only not being seen anymore but also because the bush may cover reference points used to locate it)
I don’t believe anyone will be processing where is weak spots of Sherman or kv, bushed abrams is still Abrams, doesn’t location of weak spots isn’t any problem, identification also if you can’t hide whole tank + seeing it is very easy, WT brains remember those few colors of bushes very well, it can’t hide anyone, much better are normal stationary bushes.