Yeah it’s hard to reconcile the dryness with the lack of fire. Though a) the dry weather largely came later once a lot of vegetation had a good dose of rain; and b) as you say, a necessary ingredient is an ignition source, and with the lack of rain storms comes lack of lightning.
And perhaps residents and visitors were also a bit more careful with fire, smoking, etc. Honestly, Ontario should have been up in flames due to the dryness. The lack of lightning might have been the thing that saved us from all that.
Similar in BC having a decent rainy season helped If we had another drought like previous years it could have been disastrous