gp is refering to a morality that is deontologically grounded, not just one based on altruism. Here it is not necessarily for one "reason" or the other, but rather acting the way some ideal person would in a perfect world (famously for Kant within the "kingdom of ends" where every person is an "end to themselves").

It's a rather huge theoretical distinction that at least in the West goes all the way back!

In general, one shouldn't confuse ethics itself with the whatever one might think is the most viable ethical system! It isnt a product to market. Utilitarianism is no less silly the anything else, and has its own ridiculous edge cases and all that.