Playing multiple 50-55 win teams is much more difficult than playing multiple 40-45 win teams. The team that comes out of the better conference (when there is a great enough margin) will be a little more worn down. In regular season terms, it’s like playing a fourth game in five or six nights against a team that’s played three games in the seven nights. The second team will have fresher legs and an advantage in that department. GSW lost to the Cavs for a few reasons, one of those being that they just came off a seven game series against a stingy OKC team that had two uber-athletic superstar players. Curry plays hurt, Bogut (read: only true rotation big) gets injured out of the series. Cavs had essentially swept a weak eastern conference and could have Kyrie and Lebron go all out for seven straight because of no fatigue.
Whether or or not that’s the case, having a single team be better than another single team (throwing out the factor of how teams match up with one another) doesn’t mean anything for the strength of a conference as a whole. Using Springsteen’s example above, if one conference fielded seven sub-500 teams with one 50-win team, and the other had eight fifty win teams, the finals matchup doesn’t decide which conference is better. That’s an individual team achievement, and has nothing to do with the rest of the conference.