I'm sorry you're feeling so sad. It is very difficult sometimes to watch this happen. Take comfort in knowing that if one set of eggs is destroyed, within two weeks the parents will lay another set in a new nest. They usually lay every six weeks, often all year round (especially here in California), so make many babies. And from a personal point of view, mine get mad at me for about a minute and a half when I steal their new eggs, and then it's forgotten.

I do give them dummy eggs or boil their eggs but in between they really don't seem to notice.
They take wonderful care of their babies but are not emotionally attached to them. They will care for a baby if it is in their nest, and if they are "expecting" one or already have one, whether it is their true baby (from the day before, for example), or a new foster baby. And often we will need to pull in a small baby for whatever reason, and the parents will just go on with their courting and lay new eggs. I've never seen a parent looking for their baby for more than a bit.
I know your situation is especially difficult as you have no say in what's happening, but it is truly better for them to toss an undeveloped (or even semi-developed, even though it seems cruel) egg rather than be killing the babies in a few weeks. It's better now that the pigeons learn they cannot nest in those places, in order to protect future babies and generations. I know you enjoy watching them too, and I'm sorry you won't be able to.
I used to work on the third floor of a tall building near the marina, and often had crows and seagulls (certain ones) come to visit my window for treats. For over a year they visited, bringing new babies as they fledged, and would often just sit and "talk" to me even when I didn't feed them (didn't want them to rely on me for food). Until of course one day I was told by a maintenance man that a new guy across the way in the other building was complaining. . .and didn't even have the guts to tell me to my face, but rather remained anonymous through the maint. man. He threatened to tell the building manager (who was a real jerk and animal hater) if the birds came around anymore and was just quite nasty. It broke my heart to see my crows waiting for me when I pulled up and flying up to my window to say hi, and I would have to wave them off. Eventually I started feeding them down the street but of course it was never the same. So I really do know how you feel and how disappointing it is.
Maybe you could visit some of our members near you and visit with their pigeons? I know you said you aren't able to drive but I'm sure something could be worked out. I'm not sure exactly how close they are but we do have members in your area. I hope everything works out and you are able to rest easy and feel better.

We would of course still love to see your albums of them!