Those examples given are characters that succeeded -despite- being alone, overcoming the challenges associated with it. With Lone Wolf it becomes a situation where you succeed -because- you are alone. None of those examples magtically grew stronger and mightier because they had no buddies nearby. It makes no sense in the setting to just grow more powerful beyond what people otherwise would achieve just because you decide not to have friends with you.
DnD is at the core a team game, for a party of people. The D:OS games were not neccesarily this, they had their own ruleset where you could be any class/class combination you wanted, it was based around having strong characters rather than a group of people with specific roles. A single strong character could replace 2, or even 3 partymembers.
Sure, it is possible to solo a DnD type game or even BG3, it is a nice challenge and I did this often myself. But that is just it, it is a challenge and meant to be. One character should not just be stronger and negate that challenge in a teamgame just because. Considering it is already possible to solo BG3, a lone wolf option kind of negates that challenge, as well as make going solo as default an option as a party of people, in a team/party based game. One character is not meant to replace a full party, in the dnd style setting.
