Deurali May be its a Dogma but who cares ..the reason and context of it is so pure. And it can be understood only by people who have brothers and sisters. There are many things we Nepali celebrate for the heck of it! Why do we celebrate both Baisakh 1 and January 1 New. That in my opinion is just a reason to booze and party. On the Contrary in Dashain we meet with our family and relatives ( It may not be a big deal for ppl staying in cities) but ahve you seen ppl overseas or ppl who flock back to their hometowns to be with their loved ones during this time? Also in Bhai Tika brothers save their hard earned money to give something that sister wants ( Yes it can be given at other times too.. but this day is a catalyst to remind that we need to take care of her wishes.!) If you donot want to beleive in something dont practise it . Our religion is great in that expect that it doesnot force you to do something you dont want. But donot preach!!