Change glass ipad air 2

So i have one ipad air 2 with broken glass

i dont do repairs for ipad by myself i normally give that work away.

i bringded one ipad air 2 to a shop and he said that they got so much problem to only change the glass so he want to change the whole LCD would cost me about 120 us only glass is around 30 us , apperently its so hard on ipad air 2 so he stopped doing it, and i said i would think about it then he offered to buy it from me.

i think he is talking bs and just want to buy it so he can fix it.

Does anyone share his experience that its hard for ipad air 2 with glass ?

or is he talking bs ?