That's a bit strange considering how elite Bourque was at offense and defense.
You realize how often Bourque was considered the best defensive Defenseman to go with his point totals right? He finished 14th, 9th, 11th, 20th in overall scoring and was just outside of the top 20 multiple more times. He lead his team in scoring 5+ times and was voted often by coaches and players all over to be the best Defensive Dman in the league.
Karlsson finished 10th, 14th, 4th, 17th, 11th
I don't recall Housley ever finishing top 20 in scoring and i do know he lead his team in scoring a few times, but I do also know he was considered the one of the worst defensive liabilities in the league. Coffey wasn't as bad as Housley, but nobody would ever confuse his Defensive play with Ray Bourque either. Virtually nobody has ever ranked Housley in the same universe, nor do they usually rank Coffey over Bourque, and a fair majority consider Bourque above Lidstrom and Potvin too.
Karlsson has several years where he was very good defensively and offensively at the same time. few and far between though. Last year was NOT one of those years.....But he was still better than Housley haha
Housley doesn't even usually make it into top 50 lists because he was so bad defensively.