This is true, but you also need to factor in the chance that the bunt does not succeed. I assume that chance would drag the 66% down to the 61% range, if not worse. There is a non-zero chance that Jansen pops it up, right. So it's not just 61% vs 66%. There is say a ~5% chance (pop up, etc.) that the 61% chance to score a run becomes a 40% chance (runner on 2nd, one out).
I'm sure the complete math has been done somewhere online.
If Jansen has only a 5% chance to fail their "one run expectancy" is 64.685%
10% chance to fail it is 63.37%
20% chance to fail it is 60.74%
I think.
And, per this: https://blogs.fangraphs.com/the-truth-about-bunting/
MLB hitters only succeed at getting a committed bunt down fair 50% of the time. That means given two chances a typical player would get it down in play 75% of the time and fail 25% of the time. That's not good enough to bunt by the numbers!!!
Also, fair does not necessarily mean it's even good enough. Fair could mean a missile straight at the pitcher that doesn't allow the runner to advance.
Also, Danny Jansen is not even a practiced bunter.
I think we have the answer. Don't bunt in that situation unless the hitter is a good bunter.