Not quite, my point was that tanks, compared to bruisers can't get gold as easily as the latter, bruiser have damage, which means they can get kills by themselves for themselves.
MY idea for tank is a champ who builds exclusively tank \ utility items and contributes to the team with CC and utility, think of Braum, Leona, Alistar, ok, mainly tank supports, because that's the only way you can see them efficiently played.
How many times you see full tank champs played in jungle or top?
You can, but not as efficiently as a bruiser.
CC and Utility won't be enough to duel a bruiser.
How do you get gold as a full tank champion if you can't and WON'T (Others in your team can make a better use of the gold most of the time...) get kills?
The support items aren't enough.
Increasing offensive items price should alleviate the out of control snowballing we have in pre-season thanks to Dragon buff and less jungle presence.