OK? I really disagree with that statement.
The TrailBlazers and Sonics were IMO the least star studded/imposing teams the Bulls faced in those 6 finals. With that said, the Sonics still had the most wins in the league the years they faced Chicago (64-18)
Overall the East and West were pretty even, record-wise in most all of Jordan's 6 titles. Especially when you look at records among(top & bottom) the #1 and #8 seeds for both conference....and pretty close as well in terms of teams with 60+ wins, 50+ wins, etc and win totals for the bottom 6-8 seeds. I don't see the disparity you are referencing. By contrast recently, the West has 9 seeds that would be 6 seeds in the East, and one year they would have been like the 4th seed.
I think like 96-97 the East was considerably better, but that was really it. Overall, Jordan faced a Laker team that was aging, but did have a lot of their key components that had won a championship a few years earlier. Jordan faced a league MVP in Barkley with KJ when they played Phoenix, who might have had the best record in the NBA that year IIRC. They got HOF duo Stockton and Malone twice....including a season where Chicago and Utah finished tied for top record in the NBA.
Through all of that, the rockets teams pre-post titles were never able to navigate the West to get to play the Bulls...and that includes after they added Barkley to the mix with Drexler/Hakeem.