Shorting on the other hand is actually easier in a bear market where everything is simply just going down like lightning and that makes more volatile markets easier to short as long as you can use the market condition itself as an indicator. Normally, no sane trader will want to short the market when it is reaching a potential support in the first place, you only short when there is a break out based on your analysis to the downtrend which is usually always the normal thing to do.
It is trading and it is market, usually nothing is guaranteed and you cannot always be 100% right, but like you said, there is always a need to know when you are making certain decisions in the market which I believe any knowledgeable trader will not make the mistake of buying at resistance or shorting at support.