I wouldn't say that. There does seem to be an implication as to Doughty's defense relative to Tanev's own. Here's the statement:
Meaning, Doughty/Karlsson are not also as good at 'actual defense'. When in fact, Doughty is appreciated for being "flashy" alongside being stalwart defensively. I think the statement was worded poorly.
I would suggest that you might be reading into it too much as well.
"People love to see Doughty
spins and Karlsson
coast-to-coasts and don't realize how important actual defense is."
Spins/coast-to-coasts are the subject being compared here. This only suggests that Doughty/Karlsson's flashy moves aren't an example of actual defense, not Doughty/Karlsson themselves. The comment doesn't condemn other aspects of either player's games.
In fact, if that comment were about Doughty's flashiness vs. Doughty's underappreciated defensive game, it would apply just as easily.
If I had said "people only pay attention to Chara's physicality and don't realize how important actual positioning/stickwork/defensive IQ is", no-one in their right mind should read that as "Chara has poor positioning/stickwork/defensive IQ".
Could that statement be used as shots against those players if the poster was actually arguing that they were poor defensive players beforehand? Sure, but as an isolated statement, it can't be taken that way, IMO. In fact, I think that the conditioning of hearing this argument used that way often and the negative stigma that Karlsson's defensive game has is simply giving that false impression. I think that's all it is, I don't think it's poorly worded, personally.