Great scenario, thank you.
I am envisioning this as best I can, in context with the invisibility and hiding rules, and in context of my own background with combat sports, archery, fencing and wrestling.
Sure, but if you are experienced in these things (me too, some of them), then you know that all sorts of crazy stuff can happen in the moment. This doesn't have to be some regular maneuver that was expected to work every time. It can just be a one-off.
You sneak up to the goblin, he goes to shoot your buddy, and you quickly, quietly, briefly, tap his bow out of the way, and he misses (or you do - say you were too slow - and he hits).
As I picture it, the "slow and careful" method would take several seconds,
There you have it! You were too slow! Goblin shot your buddy. (Rolled high enough with disadvantage that he still hit).
and would be an action rather than an item interaction.
Only if you want it to be. Rules don't have it as any kind of action at all. it just happens. This is just one of many reasons as to why.
And to do it quickly and desperately would need some sort of roll or be likely to reveal your position, due to sound made during your hasty action.
Only if you want it to be. Or Goblin didn't notice because you didn't reveal your position. Because granting him disadvantage just
happens. This is one of many reasons why.
The feelings of wind pressure on my body and much narrower bow from a given direction and some discrete force pressing just on the end of my bow are, physically, totally dissimilar.
I knew someone would say that. I'm not the goblin, nor are you. Maybe he's an idiot, Maybe the pressure was so brief, he wasn't sure
what happened. Heck, if someone else (your archer, say) is shooting at him in the same round, he might be too busy to care. Combat is chaotic. Maybe he's just nervous, and thought it was his own fault.
I note we're also talking about standing in front of a shooter but accepting that there is no chance that the archer inadvertently shoots the invisible person.
Yeah, the goblin can't see you, but you can see him. You can stand off to the side, like you say.
Which would likely be a real risk, especially if the archer is tracking a moving target behind the invisible character, who can't see the target behind himself. I accept that there's no chance of that, given the game's inherent assumption that invisible characters are deliberately staying out of such firing paths.
Exactly.
Remember that to hide requires an action, and to remain hidden requires an ongoing effort at stealth.
Yeah, you can assume that you're trying not to give yourself away. But more importantly, you're not doing anything that gives you away, because
granting disadvantage to a ranged attack made within 5 ft. while you're invisible is not one of the things that gives you away. Therefore, you can assume that your efforts to keep youself hidden are successful!