If you want to say that match point is not the only measure of how someone got close to win a match, I can agree, but exactly what you phrased is an almost perfect contradiction.
Technically, you cannot get closer to winning than with a match point. You could perhaps try to distinguish between different kinds of match point: If you have multiple match points (e.g. serving at 40-0), you have a better statistical chance, but regarding the "distance" to win, all match points are born equal. You can add subjectivity -- are you serving, receiving, how you got to it, etc, or again how many match points you have. You can even analyze the point itself... how it was won or lost. In the case Front mentioned, Rome 2006, it was a matter of inches (maybe half an inch). It really, really cannot get closer than that.
I get that other points may be important, and get you close to winning. But you played tennis, you know: close is not enough. We cannot even say that is unusual that a match is turn around when a guy is serving for it. There are important points, sure, to get a break up in decider, so on and so forth. But a break up can be easily lost. With match point it all goes down to a single ball. If you win it, there are no further "ifs".
Anyway, I agree that 9-7 in the fifth means a helluva competitive match. But getting to match point is still a tad above it.