Highlights with light haircolours

I would like the highlights on the lighter shades of hair to be more visible. I don't understand why there is such a big difference between dark and light hair. Please give light hair lovers properly visible highlights too! This is something that happens with old and new hair alike.
https://i.imgur.com/OM0bpUZ.png https://i.imgur.com/WMQxzd0.png https://i.imgur.com/35vyvfE.png https://i.imgur.com/Za4fyPk.png

Even when there are clearly visible highlights on lighter hair, it's less so than with dark hair.

https://i.imgur.com/VyHNjpf.png https://i.imgur.com/yRuLayY.png