Who is forcing you to level up? You know you don't have to level up if you don't want to right?
Uhm, again another example where a person has no self control. I mean the power is in your hands not to level up. I said it before, will say it again. It's becoming pretty sad when people say the game should be this way or that way, when in fact it can be played exactly how the person wants it.
You want a level cap? Then stop leveling. Who is forcing you to level. We complain a lot that Bethesda doesn't give us options. Again, Bethesda gives us an option that a lot of us want, but YOU DON'T HAVE TO DO. Fallout 4 gives us an option when and where to level. We are not automatically forced to level up like Fallout 3. We don't level up automatically when we sleep like in Oblivion (actually I forget what game it was from Bethesda been so long since I played that way.)
Want to stop leveling at 20 or 30, then do it. Don't level no more. If you can't do it, you have no one but yourself if you can't limit yourself when playing a single player game.
Want to play Dead is Dead, do it. Some people think this is the way the game must be played or should be played. Want to play where you need food and water and what not? Do it. Set the limits yourself. Why do you need Bethesda to set the limits for you? Don't have the will power or control to do it? It's not Bethesda's part that just speaks more of the person who can't do it. It speaks more of the persons character than anything.
When you set yourself to level up to 20 or 30 or what ever you want, your Picks you choose will really mean a lot. And just to show us that you are not at hypocrite, play with a level 20 cap or 30, AND DON'T GO OVER because that will prove that you really don't want a level cap and will prove that Bethesda was correct in what they did.