If you saw the video the owner of the lost Tfillin was not the only one who stuffed in tiffin in a cubby hole where they didnt fit, He was just the unlucky one. It could have happend to anyone of those other people and if you go to many shuls a similar situation occurs. People just stuff their tfillin somewhere in such a way something could happen, Im sure tiffiln falls on the floor regularly and the owner doesnt know and some good samaritan jsut picks it up, Ive seen enough tfillin storage spaces where they look like they are about to fall out.
If it was a $100,000 diamond ring would you stuff it somewhere in a cubby hole or some other place where something easily could happen Kol V’Chomer one should treat there tffillin in such a way