Bulky hexie seams

So I was kinda lazy and didn’t cut my fabric into hexagons before basting, I cut into squares and have ended up with lots of unsightly and bulky seams. Last night I started trimming them (after they’re all stitched together), is this necessary? I figured the extra bulk will do me no favours when it comes to quilting, but thought I’d ask here to see if anyone more experienced knows the deal.