Not sure what you're referring to mate?
I'm saying football now isn't like it was 20 years ago. Full-backs are just as important going forward as they are defensively. It's why most good teams play with wing-backs or they play 433, with the midfielders tasked with helping the full-backs out so they can get forward more regularly.
Trent Alexander-Arnold and Joao Cancelo are probably in the top 10 creative players in the world right now and both are full-backs.
It's also the manager's job to organise the team and the players defensively. We can keep blaming individual mistakes but when they keep happening, as they have done, you have to look at how the team is set up and why they are happening.