ISRG dropped Earnings aftermarket. Stock Falling.

ISRG Beat Q2 expectations (Rev 2.89B vs 2.82B, EPS 2.8 vs 2.51). Stock has fallen recently and is falling afterhours. Personally, I don't think the high valuation is going anywhere on this stock. This feels like a dominate company that dominates their sector and even if competition gains ground, with the tailwinds in robotics this feels like a sector I want a piece of the leader in long term. Does anyone think Medtronic/J&J competition hurts ISRG's valuation/multiple by potentially ending their