We sometimes don't talk much about it especially when the network is working smoothly and no obvious signs of congestion. But we later go back to same problem when TX fees increases, and so many pending transactions are all seated at the mempool waiting to be confirmed, at this point in time, those who are able to pay higher fees get their transactions ahead of others, but for how long are we going to continue like this ?.
You misunderstood how bitcoin was designed to run in the long term, where a state of congestion and high fees is the desired state, whereas lack of congestion is the problematic state.
When the block subsidy becomes insignificant in a decade or two, the only thing that will keep bitcoin secure is high total fees for every block, and that can only be achieved by keeping the network congested.