MINNEAPOLIS — The notion of being a Teflon coach is one Erik Spoelstra assuredly bristles at. He has been more than open during this uneven start by the Miami Heat to acknowledge second guessing himself. But what has kept him, and his team, energized, he said, is the awareness that there is no escape hatch, no easy way out. That, Spoelstra said, is the other element of his enduring longevity, now in his 17th season of stewardship of the Heat — no, not the threat of dismissal, but rather the reality of expectation to make things right. “It’s a sobering reality of our profession.