Clinton -

There are some who are good at doing some things and others who are good at doing other things.
Should we all get together and sort out the biggest problem right now, putting everything else on hold, and then move on to the second biggest problem, and so on?
By the time we got to the fourth or fifth biggest problem it would be beyond fixing.

While there may or may not be more important things than animal welfare, not all of us are cut out to tackle every problem that comes up.

Some people make good nurses, others make good firemen.

You are correct however, in asking why more people are not concerned about the abuses perpetrated on other people as a matter of course.