which is fine for YOU---but I really do not think I am all that weird or all that negligent for not prewashing new clothing (or sheets or towels, etc) before use for myself or my kids. Even with one kid who breaks out in a rash if scented lotion is put on them and another who breaks out in a rash from sprayable sunscreens, no one has broken out from wearing new, unwashed clothes. I doubt the chemicals in them are so very terrible---probably sort of like not putting a child's name on thier backpacks beucase a a stranger might approach them by name and the child might go with them--theoritically a risk, but not really something that happens often enough to be statistically relevant in reality.
And. more to the point---if the point of prewashing clothing is to get chemicals out---is it all that unusual that a mother who regularly exposes her 6 year old to chemicals in hair dyes, teeth bleaching, etc would not be concerned about some tiny amount of chemical residue that might be left on packaged items from a store? I just can't see how the clothes not being prewashed is any more odd than the mom putting back on her outfit from the night before.