Anyone can go and view these documents at the Public Records Office in London for free.
There is a substantial cost in making digital copies of all these records, in creating a searchable database, in designing a website, employing people to administer it and the cost of hosting it.
And all that effort is for our entertainment, curiosity or amusement. It serves no useful function to Government and rightly is not a statutory requirement of Government.
The taxpayer should not pay for this expensive exercise just to satisfy amateur genealogists and it is correct that there is a charge to access the data on this site.
In short, access to these public records is free, access to this website is not.