True, but I think its worth noting that inferring what a parameter could be is much easier if its something other than a boolean.

You could of course store the boolean in a variable and have the variable name speak for its meaning but at that point might as well just use an enum and do it proper.

For things like strings you either have a variable name - ideally a well describing one - or a string literal which still contains much more information than simply a true or false.