The question is not if every thing is universal. Can every one follow these ideas. Brahmins who lived at the mercy of Kings, Jamindars etc., or on their own in the forests followed all these ideals. No one else had the time or luxury to be poor and wanted to do all these. Vaishya went after money as the first step, Kshatriyas went after protecting the society, the body power people went to protect the whole society. So, when the society evolved with a few people (average life was less than 40 years or so), people who lived sixty years were thought be blessed, hence the 60th birthday celebration, then 80th and then 100the, but none after 100+. So, we followed them as a cultural tradition to make our life a little bit happier. Most festivals was to have a good, sweet meal. Today, if you have money you can have daily Deepavali or Vinayaka Chaturdi, but for poor still these festivals are the only way that they can expect a really enjoyable meals. In villages (75% in India) that is why celebrations are important. So, in cities they get bookish learning not our heritage, genetic inheritance, importance of relationship, extended families, merging of families with marriage and all other cultural aspects. COVID should show them the need to understand our culture. Whether they believe in our rituals or not, the familial and societal consequences will be there. When they become old, rituals give them a co-op mechanism -visiting temple but getting walking benefits for the duration of three rounds around the perimeter of the temple, meeting old friends and feeling being part of a living world, to share and care, to teach old learned techniques and so on. But each generation has to learn, document and make the younger generation to understand the significance and benefit. I have seen some US born Indian boys worshiping grand parents. When I asked them, they said we are thanking them for bringing up our parents in a nice way, we remain vegetarians, we follow rituals but also understand them part of cultural anthropology, we get the love and care from our grand parents. Thus, to dismiss the rituals without knowing the significance is the failure of the parents and not on the system. Your view appears to disown the ignorance of understanding all our values hidden in these rituals. Educated and informed parents will know how to teach respect for elders in our culture as a worship of the earned wisdom, not found in text books. That is why, in the west people are searching for their roots. With genetic problems, it is important to know about our extended family (may for a later cure etc.) and our systems, discarding offensive part. Please use inductive reasoning and not a deductive algorithmic reasoning to understand our culture.