Earlier quoted context omitted.
That's an extremely easy thing to say from a place of privilege, and of course there is some truth to it. On the other hand, how many chronically broke and miserable people out there are only hanging on for love of a pet (perhaps the only consistent source of love and meaning in their adult or entire lives)? I'll bet its a lot. But fuck them, they're poor so I guess they should either tough it out alone or die. Sorry…
Who are you proposing should carry the cost then? Society?
A cost-benefit analysis could try make a reasonable argument for subsidized animal welfare.