Is business 80% Psychology and 20% Mechanics?

Tony Robbins' says business is 80% psychology and 20% mechanics. Is that true?
00:07 Business is 80% Psychology & 20% Mechanics
00:50 What’ll take me to 100K won’t take me to 1M
01:29 Get around people who are where you want to be
02:23 Challenging Limiting Beliefs
02:44 Byron Katie's Four Questions
03:20 Concluding Thoughts