How important is the front panel assembly cable bracket

I've had a run in with a screen replacement shop - they repaired a cracked screen in September but the displays functionality has been on the decline now for a month.

It's now unusable (colour lines blur & distort - then cut out) - when I took it back they stated "dust" was the issue - getting a second opinion it transpires they never attached the front panel assembly cable bracket - I understand this acts as a protector if the ribbon becomes detached but could it's lack of presence actually destroy the ribbon?