The laws were originally written over a hundred years ago. And they’ve changed immeasurably since. The idea that the laws are sacrosanct is very strange. So many changes have been made that have made the game better: the use of red and yellow cards, the use of substitutes, the back pass law, GLT, countless other minor changes. the game evolves, so do the rules.
As for the ideas that local parks should have the same regulations as the top level, nice idea but utterly impractical and it happens in most other sports and has done for years. Cricket, tennis and rugby are the other big games played in this country and they all have technology applied at the highest level, they’ve all benefitted from it, and the grass roots doesn’t suffer one iota.