It was a bit more of a rhetorical question with an emphasis to the latter.
There will be some luck involved (positive or negative) as it is with every team and player, however for me there is a pattern that is emerging with their injuries.
The players who often play down the centre of defence or their midfield have recently been injured: Gomes, Matip, Fabinho, Keita, Henderson and Milner.
Every team is facing a congested fixture list and more so if you're successful e.g. cups and Europe, but their intensive style of play is causing fatigue.
I don't think this is the end product of this season, but rather an accumulation of the last few years.