Six columns and a lot of horizontal lines in display of MacBook Pro 2018

I bought this MacBook Pro 2018 four years ago, and I like it as it's an essential tool for my job. There had been some malfunction on keyboard, it had been fixed twice with replacement of whole keyboard, the first time is 2020, and second time is two months ago, the last time is almost close to deadline of Apple's keyboard service.

Two months later, I was working with a bluetooth keyboard, I was even not touching this macbook pro, it suddenly went to malfunction, there are a lot of horizontal lines on the screen as photo shown like this.

I went to genius bar, the guy told me the screen was broken, he has two advices for me, the one is to replace the screen which would cost me 5,100 RMB, or I give this MacBook to Apple that I could get 4,200 RMB, it's so unfair that I had paid more than 20,000 RMB for it, and he refused to give me a reasonable explanation why the screen went broken, but he did imply that I might had pressed the screen, it could be like this if it bore too much pressure.

I found some cases just like mine on youtube, it might be so called FlexGate Cable issue, Apple confessed the FlexGate Cable issue on some 13 inches models which don't include MacBook Pro 2018 15 inches. I swear I don't press the screen at all, and the guy in genius bar looked over the laptop and found no sign of any pressure.

I hope the Apple either confesses the screen fault, or expand the 13-inch MacBook Pro Display Backlight Service Program to cover the more models which might have the same issue.