Controllers can’t always catch everything pilots are doing. Unfortunately we can make mistakes, some things can slip past our full attention. That’s not to say that it is okay that we don’t catch it, it’s an error on the controller’s part
Controllers will help pilots avoid conflicts and pilots always should be aware of their surroundings, checking where they need to go and who they may conflict with.
Taxiing at 34knts when there’s heavy traffic and trying to get in front and cut everyone’s way. Exiting a runway and seeing that an aircraft and moving towards them, they start taxiing as fast as possible to get in front. These are both things we would not advise you do.
Taxi between 10-15knts when there is a lot of traffic around. Give the right of way to aircraft. Be aware at all times.