I definitely can't argue with your point that the tool may be out of date with its conversion/transfer rates.

But the the fact that it shows Hertz Gold points as convertible to Marriott points is germane as someone made a very "limiting" comment about which programs allow transfers into Marriott Rewards. And while I don't use Hertz enough to know its program very well, its website right now does mention that 600 Hertz points can be transferred to 1000 MR points.

So it looks like Hertz Gold point transfers is another option for getting Marriott Rewards points. Now whether it is a "good" option or not is a whole different discussion.