Why would "remove null" be better than the Dart approach — "When you opt into null safety, types in your code are non-nullable by default, meaning that variable

Why would "remove null" be better than the Dart approach — "When you opt into null safety, types in your code are non-nullable by default, meaning that variables can’t contain null unless you say they can." ? https://dart.dev/null-safety https://dart.dev/null-safety