Why are semi-colons sometimes not required?

Over the 20 years I've been developing commercial software one question I still have with the Delphi language is why was the language designed so semi-colons are not required at the end of methods? For example:

function DoSomething: boolean;
begin
  if FDoSomethingElse then
  begin
    DoSomethingElse;
  end
end; 

I believe the reason why the compiler does not complain about this, is because the semi-colon in Delphi is a statement separator and not a terminator. If I modify this function for example:

function DoSomething: boolean;
begin
  if FDoSomethingElse then
  begin
    DoSomethingElse;
  end;
  DoOtherStuff
end;

I obviously need to now add in the semi-colon, but I do not need to add in the semi-colon after 'DoOtherStuff'. I currently cannot see any benefit of leaving the semi-colon out. I would not normally code this way and always add in the semi-colon for 2 reasons:

1. Adding the semi-colon makes the code more consistent.
2. It means later on when the code is modified the semi-colon does not have to be added.

I have come across Delphi developers who will not put in the semi-colon if it is not required, but cannot see any real benefit from leaving it out. Maybe I have answered my own question, and that is the semi-colon is a separator and when the language was developed they did not see any pros or cons of just allowing the semi-colon not to be there.