Each one has his/her own experiences with stock market. Some say dont trade on expiry day, other say dont trade "Options" at all as it is too risky.
Its like the blind men with the elephant, each one experiences it differently. Thats what makes the market.. for each buyer there is a seller and for each seller there is a buyer... each with their own thinking
But see what works best for you.. your trading style and your circumstances e.g. intraday trading, mobile trading, option strategy, etc. and stick to it and be consistent, you will be highly profitable.. just my 2 cents.