Not defending embryonic stem cell research but his reasoning is flawed. All those people would say it was vital at the time but now an alternative has been developed.
But the description of adult stem cells as “an alternative” is also a lie, because embryonic stem cells have been shown to be universally unstable for use in therapies. The ONLY viable stem cell approach that has been demonstrated is through adult stem cells.
Therefore, it is not “an alternative”, because embryonic stem cells are not viable.