How do they decide if a small mole needs stitches or just clipping or shaving?

I have what I consider a small mole on my face and this doctor said she’d take it off and “put in a couple stitches.” I have had half a dozen much larger ones removed and not one had stitches. How did she decide that’s what it needs? Could she be over treating? I’m not too crazy about having stitches in my face whether they’re removed or dissolve.