That's great for you, but let's be clear here: bodyweight training isn't going to get you results as quickly as barbell training. I say this with no malevolence

That's great for you, but let's be clear here: bodyweight training isn't going to get you results as quickly as barbell training. I say this with no malevolence: I do bodyweight training all the time. Bodyweight training is perfect maintenance exercise when you're already in good shape because you can do it anywhere with minimal equipment. But if you aren't in good shape, it's going to take years to get the results from body weight training that you'd get from barbell training in months. Barbell training does require a physical location for obvious reasons. And community might not be helpful for HN introverts, but most people are extroverts. Certifications are also a good idea for safety reasons: improper lifting is dangerous. However, this is an area where Crossfit is plenty open to criticism: I'm not sure what goes into getting a Crossfit certification, but whatever it is it's just wrong.