Yes I have been surprised when I read that yesterday, I really thought polices and law enforcement agencies had some means to track suspicious transactions over the Lightning Network but it seems to be very difficult for them actually.
cryptocurrencies dont have eyes, ears or brains. they are just code. governments cant control the crypto because decentralised code has no brain. and authorities dont have the manpower to control, monitor all of crypto
however authorities can control the businesses and people that interact with crypto
government and law enforcement do not track suspicious transactions of any/all crypto currency themselves..
you will not find any office where cops or government leaders are sat at computers monitoring crypto transactions..
.. they delegate and use businesses to monitor their own customers and share information and then that information is used to investigate suspect crimes reported to authorities by the businesses
laws are made to cause businesses to become the monitoring services of their own customers
EG river financial/bitrefills and all other known services that do/will operate on lightning offering payment facilitation services such as routing and 'renting balance' will become the monitors and reporters
laws are made to cause a barrier of entry for small business/individuals to offer services, so that the larger businesses that are licenced(regulated/delegated) where they are set up to KYC/monitor customers actions become the defacto gateways that customers use to enter/exit/use crypto