Invalidation and noise are different concepts. Invalidation is the price level that breaks the reason you entered. Noise is the ordinary range the market prints while the thesis remains intact.
When traders park stops just beyond the last wick, they often confuse the two. A brief probe through that wick is common in liquid sessions. The thesis may still be valid; the account has already been stopped.
A practical approach pairs structure with a volatility buffer—often a fraction of ATR beyond the structural level. The stop still means something: if price reaches it, the idea is wrong. Until then, you are not paying rent to every tick.