Opinions cannot be evidence, but evidence can support opinions.
Let's say someone (P1) thinks it's better to ride a skateboard to school, and someone else (P2) thinks it's better to ride a bike to school. P1 says that riding a skateboard faster because you can do tricks, but P2 says it's faster and easier to ride a bike because it's one of the first things most people learn how to ride, and it also puts less stress on your legs to move around on the sidewalk or street.
P2 has evidence to support their opinions, but P1 has opinions with no evidence to support it.