I do agree that answers in the vein of "doing more stuff" doesn't help when someone wants to spend money, not time. But with a mindset of incrementalism, vegeta

I do agree that answers in the vein of "doing more stuff" doesn't help when someone wants to spend money, not time. But with a mindset of incrementalism, vegetarianism and veganism can be mostly effortless. Mentally/spiritually grappling with and letting go of the social incentives and punishments around having children (called "natalism" by some) may take effort, but if you are already in a position where these don't really affect you, it's effortless: it's not doing something. What's more, I can frame purchases within these lifestyle choices what OP wants: buying more expensive substitutes for animal-based food I'm used to is investing in the environment and the well-being of sentient creatures. Purchases for hobbies, adopted pets, and experiences is money I would have spent on child-rearing.