This. If Tim isn't worrying about the playoffs, I could see him putting up 20/10 averages during the regular season, playing 33-35 minutes a game. Also, if Tim was allowed to play "Kevin Love" defense, his offense would be even closer to Love's numbers.
It is popular for people to do player comparisons "X vs Y". But this is really little more than intellectual masturbation except for very comparable players. The question is - what do you need for your team. If you need volume scoring or boards above all else, and have a decent rim protector, then maybe you take Love.
But, if you need elite rim protection, playoff experience, leadership, high BB IQ, above-average passing, and elite offensive skill that can be relied upon in a pinch (but not volume scoring), then Tim Duncan is an easy choice to make over Kevin Love. Honestly, it isn't even close. One is among the top 10 players all time (top 5 IMO), one is a very good regular season All-Star. Age of course matters as Love will last many more years, but we are talking about current level of skill.
In Game 6 overtime against OKC, if KLove where in TD's shoes, I see KLove chucking up 3's that clank off the rim. Duncan instead goes to his elite low-post skills against Ibaka, one of the best (if not the best) weak-side shotblockers in the league, and a terror on the court, and uses perfect skill to go into Ibaka's body and take away the shotblocking and make the bucket.