Fixed Super Light Super Safe

No. Of course not.

But, for stems, I would always err on the side of caution.
Especially bigger riders who like to give things a 'bit of a flex now' and then.
I personally avoid 2-bolters after finding hairline cracks in a Bontrager stem I had. That was certainly not lightweight.

I now have a four bolt stem, in no small part due to you talking about issues with 2 bolt stems in the past.