Well, if you're not sure, do some research! Let's compare each player's only Art Ross season:
Lindsay 49-50
1949-50 24 Detroit Red Wings NHL 69 23 55 78
Art Ross, won scoring race by 13%, won assists race by 53%!
107 adjusted points
Ovechkin 07-08
2007-08 22 Washington Capitals NHL 82 65 47 112
Art Ross, won scoring race by 6%, won goals race by 25%
122 adjusted points
So, Ovechkin had a better absolute year, but Lindsay had a better relative year against his own peers.
So, to say Lindsay never put up a season as dominant as Ovechkin, I think is plain wrong.
Lindsay's Art Ross season is weird. Has there ever been a player who won an Art Ross by more than 10% who finished so low in the Hart voting? Lindsay's own linemmate, Sid Abel got significantly more Hart consideration than Lindsay did:
1949-50
HART: (18-18-18)
1. Chuck Rayner, NYR G 36 (8-6-0)
2. Ted Kennedy, Tor C 23 (4-3-5)
3. Maurice Richard, Mtl LW 18 (3-2-5)
4. Sid Abel, Det C 10 (0-3-4)
T5. Bill Durnan, Mtl G 6 (2-0-0)
T5. Milt Schmidt, Bos C 6 (1-1-1)
T6. Edgar Laprade, NYR C 3 (0-1-1)
T6. Ted Lindsay, Det LW 3 (0-1-1)
7. Turk Broda, Tor G 2 (0-1-0)
8. Red Kelly, Det D 1 (0-0-1)
Edit: It can partly be explained by the fact that Lindsay scored so few goals relative to his linemates:
Lindsay: 23-55-78
Abel: 34-35-69
Howe: 35-33-68
Abel also played much more defense than his wingers at the time from what I have read, but of course, Ovechkin isn't exactly stellar defensively (and anecdotally, Lindsay was excellent defensively when asked to play that way).