Love also grabs more uncontested boards than DeAndre Jordan, and some of his immediate contemporaries (and less than others, to be sure) so there's a question to be made about whether or not his defensive rebounding numbers are really an indication of good defense.
The counterpoint to this is that Love's teammates know how good of a rebounder/outlet passer he is so they cheat down the court and let him gobble up boards and toss long passes down to them for easy baskets. Consequently, Love's opponents know of his penchant to throw court-length outlet passes after defensive boards so they have to guard against that - meaning that they have less guys to throw at the offensive glass.
In essence, his defensive rebounding and outlet passing is so good that he changes the way his teammates and opponents play the game.
You could say that, except Love also grabs a lower percentage of rebounds per chance* among bigs that played at least 70 games last season than Jordan, Drummond, Cousins, Boozer, Howard, Derrick Williams (?!), and Al Jefferson. Of that list, relatively unsurprisingly, Love grabs more contested boards than Williams, Jefferson, Howard, and Boozer, so it looks like your 'in essence' theory doesn't have a whole lot of merit.
*The number of times player was within the vicinity (3.5 ft) of a rebound.
http://stats.nba.com/playerTrackingRebounding.html?pageNo=1&rowsPerPage=25&SeasonType=Regular%20Season&filters=GP*GE*70&sortField=REB_COL_PCT&sortOrder=DES
Kevin Love is a great rebounder, but the numbers don't definitively prove he's better than, say, Drummond or Jordan.