They are different. Most “bugs” people see are insects. Spiders are not insects. Lots of spiders spins webs. This requires very careful stepping, so you are

They are different. Most “bugs” people see are insects. Spiders are not insects. Lots of spiders spins webs. This requires very careful stepping, so you are quite correct, their movements are very calculated. They have to step on a high wire, possibly vertically, while avoiding the sticky parts, getting knocked off, hit by prey, etc