I'm glad he's looking into it. A lot of doctors do not like temping because of the reason your doctor mentioned.
When I first started temping I was obsessed. It was unnecessary for me with medicated cycles; ivf. Now I just temp to confirm O. Anything beyond that, I don't think much of.

And I only returned to it since I was having miraculous natural cycles and wanted to know if I was oing instead of waiting 2ww's for af.
Keep us posted!