It matters because, if you give in to their demands, some cats will learn that they only have to annoy you enough to get food, and they will be happy to repeat this at the earliest convenience.
I planned ahead for this. She's got dry food out anyway, and doesn't get the wet stuff until about an hour into the morning routine, but she does want me to get up and give her attention. So a month ago I set the alarm half an hour later and moved some tasks to the night before. Last night I set the clocks back and also moved the alarm back from 6:30 to 6. Between no alarm and the longer darkness, she was willing to let me sleep the extra half hour.
No, they hate switching. Switching to DST is the actual enemy. Standard only seems terrible because we don't just keep shit like normal, so when we switch back to standard, it feels fucked.
But that's because the switch to DST is the real enemy!