So you already know about these issues, but you just go ahead and buy the items anyway?

Not OP, but I understand his/her position.

I usually buy my clothes at Uniqlo or Zara. As much as I'd like to do the right thing instead, I can't justify paying the massive premium for boutique and artisan stuff manufactured in western regions, except the occasional specific premium item, like a Rapha or Outlier jacket. In OP's case those are clothes for a small child, that will outgrow them quickly, which makes the cheap option even more attractive.

What about relatives with older children, used clothes stores or flea markets? Childen's clothes are a very good fit for reuse since they are worn for a short time. Also I'd be suspicious about toxins or artificial hormones in cheap clothes. Would likely be safer to have high quality certified and checked and tested ones.

Isn't the point here that you are paying for them, just not in a way that the market is currently able to include in the price?