If Gambling was not introduced then many people have to do the hard work for earning money.
If there's no gambling at all then we don't have easy profit when everytime we are going ot play gambling but sometimes we are just had bad luck to lose bitcoin if gambling was not introduced then many people will not lose there bitcoin into gambling every day 
And they keep it all the way to save.Many will say this especially those gamblers who are getting good benefits in gambling. And I think many people will just work the usual way because without gambling this is where many are getting their luck tested to get some good profits and fast money and no one will ever be bankrupt in gambling and there would be no way to play for money.