Is simply horrible advice!
Hiring Managers need Talent that can get the job done, not simply "give it their best" — in fact, that sort of uninformed banter does no one any good. Accepting a position is basically a contract stating that the two parties agree on the level of performance required and that it will be delivered.
Link to my book: Purple Curve Effect
Your assignment, should you seek my help in finding work:
Today's Audio Podcast & Alexa Flash Briefing:
Questions? Dial #250 and say, Contact Ski Man!