Qur'an is Guidance from Allah, His instruction manual on how to live our lives, do good, stop wrong.
There are verses in the Qur'an telling us to do a ritual, five times a day prayer/namaaz/pooja.
The earthly maulanas, masters of the majority so-called muslims, have given us a prayer, told us that it is not in the Qur'an so we need hadith, but not all the details are there so we need sunnah, practices handed down by our ancestors. This means we are following our ancestors and whatever they have given us is made obligatory or else you are a kuffar!
The self serving religious class have the majority under their control because they fail to follow what their true Master has given them.
On Judgement Day if you ignore false hadith this will be inconsequential compared to ignoring the Best Hadith, the Hadith of Allah, His Qur'an, our Qur'an.
2:170 When it is said to them, "Follow what God has revealed", they say, "Nay! We will follow the ways of our ancestors.” What! Even though their ancestors (and the ancient Imams) were lacking in understanding and were not rightly guided? [5:104, 10:78, 11:62, 11:87, 21:53, 34:43, 38:7, 43:23. Hudan and derivatives = Prominent = Bright = Lighted = Clearly visible = Leading = Guidance = Lighthouse = A well-lit road = A landmark of identification in the desert or sea]
2:171 The likeness of such blind followers is that (of a herd of sheep) which hear the shepherd’s call, but hear in it nothing more than a sound and a shout. Deaf, dumb, blind, for they do not use their reason. [This is subhuman level of existence 7:179. ‘Unq = Shepherd’s call. Shepherd here pertains to religious leaders who have learned some meaningless words or tenets, and a herd of sheep is the masses that blindly follow them. Kufr embraces blind following in addition to denying, opposing, or concealing the truth. Perceptual senses alone cannot distinguish human beings from the rest of the animal kingdom. It is the intellectual analysis that sets them apart]
2:172 O You who have chosen to be graced with belief! Enjoy the good and wholesome things that We have provided for all of you. And render thanks to God if it is Him that you serve. [2:168]