Ed Viesturs discipline was much different to what Hobbs does. Hobbs is competition climber where the main goal is to do the single hardest pitch of pure rock climbing.
Ed Viesturs was a great mountaineer. I believe he ran low 3s for the marathon which in no way compares to a high schooler breaking 4.
Not a good apples to apples comparison, but what Hobbs is doing from a pure athletic physiological standpoint trounces what Ed achieved.