For some Guardians this was the only option they had and they bear the scars of their mistakes. The easy way is to watch and learn from Guardians who already know what they are doing. Whether or not they learned what they know the easy way or the hard way is irrelevant, they can teach you how to accomplish your goals with a minimum amount of pain and embarrassment. Most Senior Guardians are more than happy to include Rookies on their teams, as long as that Rookie is being honest and forthright regarding their level of training and experience. Having Rookies on the team is great.
Rookies get to carry the heavy med kits for a reason.
If they trip over a root, they do a perfect break fall and bounce right back up. Half the time they won't even drop the bag. As a Guardian approaches middle age all the old injuries they suffered in their youth start to catch up to them. You sit on the ground and when you go to get up bones that were broken 20 years ago verbalize their displeasure with cracks that sound like a 2 x 4 hitting cement. All the twisted joints and body parts that you had replaced with steel decades ago suddenly decide to take up a career in meteorology and predict incoming storms by swelling to the point that you walk like a duck.