Affecting in what way. New house should be fix by contractor right? So, it's their problem, right? Anyway, I don't see why it can affect adjacent tiles.

It will not affect. The problem is the tile is normally fix using normal cement. When the use hammer to remove the damaged tile, the knocking vibration will weaken or delaminate the neighboring tiles. Nowadays, special mix mortar (cement) for tile placement with adhesive that hold tiles better is more common and cheap. You can just do it yourself easily. Can buy tile mortar in small box like Pye brand from most DIY shop. You can you tube how to replace broken tiles. My bathroom tile just glued on top of other tiles to create an elevation tile high only so that I can prevent water from shower to wet flooring at sink side. It is still stick fine after 10 year already I believe.