Not a vegan.
But many draw the line at intentionally harming organisms like bees and putting household pests outside, not killing them, not wearing leather, in the days of film cameras not using film with gelatin in it, etc.
Most don't worry about the animal products that go into producing car tires, book bindings, and other harder to avoid things. It is really difficult to not use any animal products so I think most vegans figure it is ok to do your best while still living a pretty normal life.
Jains are an interesting case - they try not to even consume microbes that are in their water if it is from a well - they filter the water, then rinse it. No root veggies either so they don't harm small creatures in the soil.