Normally I would totally agree with you. If I don't like the tea made with an herb, why would I make wine/mead with it? In this case, I am going mainly for the medicinal benefit, so I can tolerate a certain amount of bitterness or vegetative flavor.Better yet, make a cup of tea and let that decide for you. Looks like I may have 3 different kind judging by the slight variations of the flower. One is very fragrant and doesn't taste bad. Another is awful.
Be sure that you are looking at yarrow rather than queen annes's lace. They are quite similar in appearance, until you closely examine the leaves. Differences Between Yarrow & Queen Anne's Lace - Unruly Gardening
I have found that yarrow flowers have a less bitter flavor than the leaves. I haven't been able to find a clear answer as to whether the medicinal benefits are the same.