Don't listen to anyone telling you not to do something because the next owner may not like it. Fuck that noise, this is your house, your door, and your problem it it goes wrong. Let the next owner worry about the next owner.

With that being said, I say go for it. There shouldn't be any glass there. I would use a hole saw or a spade bit, practice/test in a piece of wood, like a 2x4, before working on your door. Drill from one side until the center bit pokes through the other side then drill from the other side to finish. Google 3/4 in white plugs to find something to plug the hole, maybe stick some insulation in there if you live somewhere cold.

Try not to listen to these naysayers. No matter how badly you mess this up it can always be fixed. Even if you absolutely destroy it, they make new ones in factories every day. It's not an irreplaceable piece of architecture or art and no one will die if a door gets ruined. Just go slow, take your time, and stop and reassess if something doesn't seem right.