I think it's just that unfortunately a lot of these laptops are geared towards gamers, and pretty much all gaming laptops have 16:9 aspect-ratio, and they also

I think it's just that unfortunately a lot of these laptops are geared towards gamers, and pretty much all gaming laptops have 16:9 aspect-ratio, and they also usually use high refresh-rate screens, which are also almost entirely in 16:9 aspect-ratio.