Firstly let’s not forget that banks and brokers are normally much more sophisticated than small retail traders and they have probably considered every ‘angle’ many times over, so if you are trying to out-wit, you may end up looking like a half-wit
Most brokers widen spreads heading into big numbers and this can cause tight stops to be immediately triggered even if the market hasn’t traded there. Also spreads can widen appreciably after numbers, again causing stops to get triggered.
I think taking a positional ‘bet’ heading into news is a bad-odds bet. If you’re a medium term trader then you won’t be affected as you won’t have tight intraday stops but daytraders live and die off 50 pips and the odds are stacked against them in news events trading. Much better imho to go into the event with no position and an open mind. When the market moves after the event you can take advantage of stop-loss runs and overtraded conditions to make some relatively low risk plays.
