Far less people died in other places but far more building damage got done (e.g. Würzburg, Pforzheim, and/or large cities hit by dozens of major raids like Hamburg, Cologne or Berlin).
None of this, though, justifies razing Warsaw. Atrocities don't "balance".
Err, Dresden was infamously firebombed to hell in the final days of the war (for no good reason).
It was also relatively untouched compared to what Third Reich planned to Warsaw even before war, yet alone the revenge spree in 1945.
There are reasons why it's practically illegal to remove most bullet holes you find on some walls on western side of Warsaw - they are the rare walls that survived.
Dresden was destroyed by the western countries (US et al). While Warsaw was destroyed by Germans.
So "we" fix what the bad Germans broke. But we keep the mess left by the spoiled West as a reminder.
Nazi perpetrators and victims of the rape and pillage "revenge" are generally not the same people. So yes there's sympathy.