It's a little murky. If the status quo comes with a cost, because of practical uncertainty, and you provide an alternative that eliminates the uncertainty (and the cost), and then you use the elimination of the cost to prefer your own method... at minimum, that feels "not fair."

Why would it be unfair? A lot of UI delays come from uncertainty, it’s often a significant technical issue.

Because you eliminate uncertainty by imposing your own standard, the adoption of which financially benefits you.

An unbiased viewpoint acknowledges that bad people doing bad things for selfish reasons, can have both positive and negative results.

There's further details about it here: https://github.com/ampproject/amphtml/issues/3133

And yeah, it's a technical issue.