Obviously everyone does but everything comes at price. The outer side brake light of a 2008-2014 corolla comes around 12k that means 4 PCs x 12 = 48k for rear lights alone. The projector alone of a Honda accord comes at around 1 lack something let's leave the entire light aside.
Under invoiced and actual taxes paid stuff has zameen as an Ka price difference.
People who say xli lacks 150 ki led stop lamp Indus saves .money that stop lamp for 150 can never ever compare to what you get factory fitted in gli or other trims. And the list goes on