Because the people who are likely to riot are probably still going about their lives as normal whilst the government try to portray the image they are still in control and the police walk a tight rope between enforcing and antagonising. That’s why there won’t be a tough crack down because if 68 million people decide they’ve had enough and push back there’s nothing the government or police can do. Listen to the language the government are using, it’s all about how the majority are complying etc, they are trying to shame people into compliance rather than beating them with a big stick and risk people getting their own big sticks. The police were told early on that they can’t be too tough on people otherwise there will be civil unrest, there’s millions of angry and frustrated people and it only takes a spark.