The sewing machine shifted the tedium of manual pabor from most people onto a much smaller number of very poor people who now work in conditions which are illegal over here (and often illegal where they are too) for very little money.
When I buy a shirt I don't know if it's expensive because a fair proportion of the price is being paid to the people making it, or if someone near the sales end of the chain has "added value" and is taking increased profit.
I don't find it inspiring. I guess I should be considering what these people would have instead - looming carpets by hand perhaps, which would be worse.
I would really like to know that the £47 ($70) shirt I buy isn't exploiting the very poor.