Do you ever ask people to help you out when you travel? Water plants? Look after the garden? Collect your post? If you have kids, have you ever asked a family member or friend to look after them?
If so, for your sake, I hope they've not refused on some principle that you should have fully considered and ensured that you'll never need to ask an annoying favour from anyone.
As noted, there are many reasons why people might need to travel with a pet that has nothing to do with "not caring" about their pet or "not considering" the responsibilities having one entails. This policy isn't a morality test.