Holy hell, thank you guys for so many inputs and responses...
Roland, thank you for your reponse, you're absolutely right in stating I just assume how the POI's are implemented based on my own observation, and I don't know squat about how the implementation actually looks like, also I do not really know if ppl play stealth very much - again, I only assume by watching some streams and stuff, which is a very small sample size to make assuption about the rest of playerbase.
On the other hand, I think there is a stealth build in the game, as I understand the term as a bunch of weapons, tools, mods, and perks specificaly tailored towards stealth gameplay, and those just are factually present.
For the last point, you are technicaly correct, but the shotgun was there just to demonstrate a point, it's not to be taken literally, it can be replaced by a machine gun, sledgehammer, or whatever. On this point, I would also like to add, that bow is usually bad choice for this situation, because I have noticed, that sometimes arrows fly THROUGH the zeds, if they get close enough....
I realize this is not a stealth game really, and not every single challenge in the game can/should be overcome by stealth, I AGREE actually! My point was, literally: stealth is, at best, a decent help in some situations (it's not even that, really, i just like to play it for a bit of roleplay) but it costs you waaayyyyy too many points to be even worth it. Honestly, if you take all those points, put it into other combat perks, you are gonna be immortal death god, that has no need for stealth anyway. I feel like we talk about the same thing, really, I only argue for a little knob tunning. This is not a stealth game, stealth is a side mechanics that can help you sometimes if you know what you're doing, BUT to even go that route, you have to sacrifice wayyy too much.