That is it in a nutshell, and exactly why the Tech is a great starter razor. When your technique is off, instead of getting nicks and nasty razor burn you just get a less than perfect shave, assuming your technique is at least somewhat adequate. As your technique improves your shaves get better.
Summary: A mild razor teaches you technique by rewarding you with success. An aggressive razor teaches you technique by punishing you with pain.
And once your technique has reached a decent level the mild razor gives you a great shave. A more aggressive razor in the hands of an experienced shaver might allow that shaver to make some improvement over a shave with a milder razor since there will be more freedom in establishing the perfect blade angle. But I see that as a second-order effect.
Exactly.