Because patches are intended for menopausal cis women, yes, the dosages are fairly low. Bear in mind, however, that it's not *equivalent* to oral doses - X mg in patch is not the same at all as X mg in pills. (In fact, in terms of blood levels, it takes roughly 1/20th the amount by patch to achieve the same results as by pills. Or in other words, a 0.1 mg patch (that is, 1/10th of a milligram) is equivalent in terms of average blood estrogen levels achieved to 2 mg of estrogen. Which means, if my math is correct, that a patch delivers about the same punch per milligram as 20 1 mg pills. That's not the same as saying it's 20X more *effective* in terms of feminization, though, because the patch doses are titrated for that effectiveness - a fancy way of saying that doctors prescribe patches in tenths of mg and pills in whole mg. They don't prescribe 2 mg per day in patches, as that would be 20 freaking patches.

) Still, it's possible that someone might end up wearing more than one patch, which can become a literal pain in the butt.
Also, there are patches with adhesive that does last, and if you're having problems with a different brand you can consider either switching brands or buying some Tegaderm or surgical tape and putting that on over.