Some great opinions have been shared already, but I'll second a few points that were already made:
1) For some, keeping cattle without a full-time job wouldn't be possible!
2) If you're truly committed to their health and welfare, you'll find enough time to care for them properly.
3) Calm stock, great fences, and adequate feed and water go a long way in making everything easier and safer.
That said, shyt still happens. I have an understanding with my boss that I may miss one or two days or half-days a year because of cattle issues. I play that card sparingly and bring beef to her when I use it.