there can’t be any “safety issue” except in someone’s imagination
For as long as I have been involved in product design, there is a process that starts at the moment of conception; hazard and risk mitigation. At that stage it is ALL in someone’s imagination. However, people are pretty good at envisioning risks even if they have no predicate device to base it upon.
It would take all of 30 seconds for a group of people considering risks associated with throttle control to identify this as a significant risk just as some people here have envisioned it.
BTW- You can find articles and reference material that cites the same reasoning.
There are lots of product features you will never see because the potential for harm identified early on in the product development cycle indicated there was a significant risk and there was no way to sufficiently mitigate it. Sometimes, the hazard is identified but allowed to exist because the return outweighs the risk but on something like this, it is a convenience not a necessity, so that makes the decision easy.