It's true in a capitalist system for sure. Automation causes fewer people to be responsible for more profit, so fewer people see the benefit of it. Capitalists argue it will just cause prices to fall, but a) to what, if many people can't find a stable job, and b) prices are quick to rise but slow to fall, nobody wants to take a loss on what they paid for/forecast, and businesses implementing this tech certainly aren't expecting to have to lower prices. Less money getting you more value increases the value of money - also known as deflation, and something economists avoid as it's quite painful.

Automation itself can be good for humans though. I don't think people should be stuck doing a bullshit job nobody really needs just because we don't want to eliminate a job. Our goal as human society should be for people to have more and more choice over how they spend their own time. Even if we eliminate basically all necessary work from human existence, creative works have intrinsic value to the people who create them at the very least, and often value to many other people as well - AI will never eliminate that even if AI becomes very creative itself.

Mandatory work should be something we try to eliminate, and replaced by people generally being able to choose to do whatever they want within reason. This is not something that makes any sense in a capitalist system, so rather than attacking automation and keeping capitalism just because that creates a more equal income distribution, we should be working toward replacing capitalism with something better, and automation is a part of getting there.