Why are you putting words in my mouth? Nowhere I said any other teams cannot win. I didn't even say Suns cannot win. I was merely commenting on your identifying Mavs as playoff folders while Suns have been playoff folders for years, in fact, since their inception...
If the crux of your argument is that the Suns have underperformed in the playoffs as much as the Mavericks have over the past six years, then I have nothing to say.
Edit: Actually, no, I'll go ahead and write it out.
2005: Suns lose in WCF to Spurs (eventual champions); Mavs lose in second round to Suns
(Series records: Suns 2-1, Mavs 1-1)
2006: Suns lose in WCF to Mavs; Mavs lose in Finals to Heat (champions)
(Cumulative series records: Suns 4-2, Mavs 4-2)
2007: Suns lose in second round to Spurs (eventual champions); Mavs lose in first round to Warriors
(Suns 5-3, Mavs 4-3)
2008: Suns lose in first round to Spurs; Mavs lose in first round to Hornets
(Suns 5-4, Mavs 4-4)
2009: Suns fail to qualify; Mavs lose in second round to Nuggets
(Suns 5-4, Mavs 5-5)
2010: Suns, at worst, lose to Lakers in WCF; Mavs lose in first round to Spurs
(Suns 7-5, Mavs 5-6)
The Suns have won more playoff series than the Mavs over the past six years. So far, two of their four eliminations have come at the hand of the eventual champions, a pattern that is likely to continue this year. Meanwhile, the Mavericks have won
one playoff series since their 2006 Finals appearance, while losing to a bunch of no-names.
I don't know how much clearer it can be.