100% WRONG
Obviously you don't have have a clue about programming.
The game as is is totally unbalanced and simply broken in a lot of ways right now, putting in more options for customising your game is only a positive and won't take anything away from anyone.
Look at the Long war mod for X-com that was made by modders and it singlehandeldly made the game many times better. if Larian can't handle to put in a single switch for different options they shouldn't be making videogames.
If by your flawed logic turning stuff on/off will spin out of contol like you suggest, why do we then have options for putting all the different items we pick up on the hotbar or not? , theres 29 options turn turn things on/off allready in the gameplay options menu, by your logic that is an impossible task.
There's a difference between gameplay and UI. 20-30 different settings for gameplay and balance which change different things and can interact in intertwining ways is different and more complex than an "add to hotbar" flag. It is not "a simple switch"; anyone who ACTUALLY programs should be able to understand the difference.
Larian has to make their balance based around a certain set of gameplay features. They cannot test that many combinations of gameplay-affecting options. So yes, asking that they spend their time and resources trying to manage eight billion different combinations instead of finding a solid base balance does take away from other people.
Your'e wrong here.
theres no balancing testing involved in turning off exploding barrels
Thres no balancing needed for turning off groundeffects for cantrips
There is no balancing needed for tuning off fast travel
Theres no balancing needed for runing off romance options
theres no balancing needed for tuning off high ground giving advantage.
this goes for most of the options,
its about ME wanting the OPTION to turn somthing off that makes the game a trivial mess and its NOT hard to include at all.