Modern days are different from ancient time. Long ago people don't have internet to research and study about religion so becoming a monk under monastery guidance is the most effective way for them to learn. Thanks to the hard work of Atheist scientist the world has develop to benefit us so much.
Secondly, there is so much distraction to practice meditation as a lay person. If we can set up a well soundproof room and abandon unnecessary activities, it doesn't matter becoming a monk or lay person we can still progress.
But the biggest problem is financing the household so in the end monkhood is still the best way to practice Buddhism. Ahh! looks like i was confused by the statement i made.