Most of their reporting does have a left bias, and of course opinion even more so.
But they do have some serious, thoughtful conservatives in their opinion pages. Like David French and Ross Douthat. And they have reported on controversial issues like the dangers of medically transitioning minors. David Leonhardt points out the places where conservative arguments have facts on their side, like how closing schools during Covid for so long greatly damaged learning outcomes and was a bad decision overall.
It eliminates blind spots that come from only considering views confirming an ideology and thus getting important stories wrong.