Because when the people are allowed to freely share their ideas with one another and talk about them without interference the cream rises to the top.
There is historical evidence of this, the monarchs of the centuries past, the Catholic church, they all stifled the ability for people to freely discuss ideas, and even killed people for sharing the wrong ones. As soon as the printing press was invented that allowed people to share ideas freely you had revolts against them all over the next few centuries leading to representative democracies and republics, the enlightenment and development of ideas such as human dignity and individual rights, diversity of religion in the west took hold, the end of theocratic rule over Europe, and it all culminated in the creation of the US and an end to global colonialism mid 20th century. We owe our great way of life and our emergence from theocratic and monarchical shackles in large part to the ability to express and share ideas freely, this is a big reason why western societies hold that right in high esteem, it was a resounding success, it worked for us up until now and it will continue to do so if we let it.
There is historical evidence of this, the monarchs of the centuries past, the Catholic church, they all stifled the ability for people to freely discuss ideas, and even killed people for sharing the wrong ones. As soon as the printing press was invented that allowed people to share ideas freely you had revolts against them all over the next few centuries leading to representative democracies and republics, the enlightenment and development of ideas such as human dignity and individual rights, diversity of religion in the west took hold, the end of theocratic rule over Europe, and it all culminated in the creation of the US and an end to global colonialism mid 20th century. We owe our great way of life and our emergence from theocratic and monarchical shackles in large part to the ability to express and share ideas freely, this is a big reason why western societies hold that right in high esteem, it was a resounding success, it worked for us up until now and it will continue to do so if we let it.