I think it should be, I think you're failing to see the bigger picture, I'm not denying that change happens but change for the sake of change and following every fashion and vogue is a VERY bad idea, if you consider the fashions such as nazism, communism, human sacrifice etc. you'll know that, I suspect that you're coming from a very fundamentalist liberal position which is going to naturally distrust what doesnt change, what shouldnt change and what is worth conserving unchanged as an inheritance from one generation to the next.
Perennials dont shed their leaves annually and completely renew, holly stays all year round, there are perennial social institutions too and it ought to be a job of work to discover them and protect them from changing them up as and when you choose for the sake of the present moment, imagine its a house and you plan to hand it on to your kids and they to theirs you dont want to add a lot ugly fashionable extentions or sun rooms or fixtures and fittings which will undermine the structural integrity and pull the whole structure down and ruin it, creating work for the future generations in building it up again, if they can, in the time and with the resources and resourcefulness they possession, or maybe the skills necessary to do so will become lost to history and generations are then simply doomed to eons of avoidable suffering.
You're describing change as positive, without any downside what so ever really, I dont see it that way and there's plenty of reforms I would like to see in the world. The kinds of constant reinvention, change is good, change is always good sort of thinking sees it always as an improvement, I doubt that, entropy and decay and deterioration ARE changes too, undesirable ones. You mention tithes as an example of negative conventions or practices from the past, I'm sure I could mention the hospitaleers and the emergence of care facilities but I'll not engage in that sort of horse trading the record is there.
Tradition and social institutions are meant to embody ancestoral memory, intergenerational learning, perhaps I'm talking about it at its best, I'm definitely not talking about it at its worst and I'll acknowledge that but I dont think that the constant start from scratch and individual and collective amnesia involved in beginning over and anew all the time would be a good idea. Everyone only has one life to live and to give over so much of that to learn things from scratch again is an impediment on progress surely.