If everyone thinks McDonald's is a swell idea, it probably is. This means that either A) Lunch isn't as important as everyone seems to make it out to be , or B

If everyone thinks McDonald's is a swell idea, it probably is. This means that either A) Lunch isn't as important as everyone seems to make it out to be , or B) McDonald's is "good enough" or C) some combination of factors including A and B that suggest worrying about where you are eating for lunch isn't worth any of your time today.