Answered by Shaykh Faraz Rabbani
Walaikum assalam wa rahmatullah,
The position mentioned by Shaykh Amjad is still held by a respectable (yet small) minority of informed scholars. They have their legal proofs, generally centering on the inviolability of the human body.
However, Shaykh Amjad himself pointed to the contrary opinion, and a clear link to a detailed answer supporting the contrary position was given.
And Allah alone gives success.
Faraz