No he wouldn't. cause Crosby is simply not a superior offensive player than McDavid.
There are two slam dunk wins for Crosby during his career : 2010-11 and 2012-13, that's it. Let’s say he won on both occasions, that would bring his total to 4 Art Ross trophies, still one less than McDavid. Seasons like 2007-08 and 2011-12 have too many variables and grey areas to give him the benefit of the doubt. But the main issue is that in most seasons where he was relatively healthy, he still couldn’t get the job done :
2008-09: He played 77 games but clearly took a step back to Malkin and Ovechkin.
2009-10: His offensive production was underwhelming for most of the season, until April, when he exploded with 15 points in his last 5 games. That late push boosted him to 109 points as he finished 2nd in the league on the last day of the season, but was far behind all year long.
2014-15: One of the weakest offensive seasons of all-time. That year should’ve been a copy/paste of his 2013-14 performance, but he completely dropped the ball and somehow lost the Art Ross to Jamie Benn, despite having a strong season start (33 points in his first 22 games).
2015-16: He picked up right where he left off the year before with by far the worst start of his career with 19 points in his first 30 games. He got better after the coaching change, but still got torn a new asshole by Patrick Kane, who finished 19 points ahead.
2016-17: Crosby was about to catch up McDavid in the scoring race despite missing the first month of the season. At one point, they were neck and neck at the 80 point mark. But in the last 10-12 games, McDavid left Crosby in the dust, finishing with 100 points to Crosby’s 89.
That’s why it’s hard for me to give Crosby more than two extra Art Rosses. Outside of that 2011–13 stretch, he never really showed a clear cut separation from his peers.