broccoli

Question

If I buy broccoli from the store and I see that there are no bugs can I eat it? Do I understand you correctly that both hard and soft cheeses need a jew supervising during production? If "most" religious communities don't properly understand halachot i.e. kashrut, eruv,... and the leaders are lacking in making proper halachic rulings, then why must one do the things that are a minhag of such communities? For example women wearing pants. It seems that if we start following things just because, then pretty soon we will all need two ovens, two sinks ,eventually even two kitchens!- thank you for your time.