I can't think of one single spot that doesn't have at least 2-3 very vulnerable entrances.
First let me say that it is my fault for not fully explaining all the situations that I find the danger close noob tube class useful. You are correct 99% of the elevated perches have multiple entry ways.
That fact does help, but those spots can be still be a pain to enter and clear due to a number of factors
1) People can equip extra lethals to cover multiple entrances.
2) People can run a combination of IED and Motion sensor to at least cover 2 of the alternate entrances.
3) Campers can run in packs from 2 players all the way up to 6, in some of the games of TDM I have played.
4) Unless I crouch walk from the entrance until the kill/clearing of the location the Awareness perk is still very useful to tell the camper what entrance I took even if he wasn't able to booby trap all the entrances.
To revisit the " one single spot that doesn't have at least 2-3 very vulnerable entrances" topic, on the map Warhawk ( pictured below ) the upper half of the building labeled "Back" only has one way in, to my knowledge. If anyone knows of a secondary entrances I would appreciate the tip.
Pic:
Again if there is another entrance please let me know. The only other option I see is to trying to get up there from the street, but that is a pretty dangerous place to try an entry from due to being out in the open with multiple angles to get shot from.
What possible camping spot is so good in this game that it requires noob tubes?
It's just much easier to do that then try to work my way through IEDs, motion sensors, and people camping the doorways with Amplify.
I never said required
I had an entire enemy team setup shop in the strip club on the Octane map. I tried to crack that nut a couple of times and failed. So I switched to tubes. I am not a great COD player, so maybe I am not using all the tools in the proper way to handle that situation successfully. The danger close tube just what I found effective. So I kept the class and moved on to exploring other weapons and perks of interest.