My own worry isn't so much about employing domestic workers per se, as about which kinds of power relations result from it. If it's just an exchange of services

My own worry isn't so much about employing domestic workers per se, as about which kinds of power relations result from it. If it's just an exchange of services for a fee, that's fine. You can sell some hours of programming as a freelancer, and that's not particularly objectionable. The domestic-help arrangement often seems to end up with weird power dynamics, though, where it's more like having a "servant" who is clearly of lower social status, and is supposed to cater to their employers' whims in some kind of old-fashioned aristocratic style. Feels less like "freelancing" and more like something more problematic.