The emphasis here is on "people cannot see the content exchanged between the client and the server". And this focus on privacy is good. But it’s also worth noticing that another key benefit from TLS is data integrity. People cannot read the content, but they also cannot tamper with it, which gives you the guarantee that the content you load is the content sent by the server you trust (and trust is a very important idea here) and nobody was able to alter it on its way between both ends.