How dangerous is it to fly with a low-cost airline?

In my view, it's absolutely okay to fly with a low-cost airline because I did it many times. Thanks to low-cost airlines, I've visited more than 20 countries. So, there's no need to worry. If they're allowed to fly, budget airlines are just as safe as any other airline. By the way, here are some sites with cheap flights, I am sure it's useful travelsites.com/cheap-flights/