Messenger SAW showed how Islam is best implemented with Quran and Sunnah and his companions followed on from their greatest teacher using the same example. Later generations followed their predecessors the same way. That is how Islam reached from one corner of the earth to another.
Now 1500 years later laymen in Islam are giving their subjective understanding of why only Quran is necessary ignoring the practical application of Islam which is Sunnah.
Dear observer-x sb, we need to stick to indisputable self evident facts not quran and hadis to begin with. For example, we know for a fact that we do not come into this world all by ourselves. We do not look after ourselves after we have landed in this world. We if we grow old cannot look after ourselves. If we get ill during childhood, adulthood or old age we cannot look after ourselves. If we are or become disabled we cannot look after ourselves. We cannot educate and train ourselves or gain needed skills we need for living all by ourselves. Can you dispute any of these facts by any means including the quran and the hadis? Not at all because anyone or anything which contradicts these facts cannot be true or right at all.
This is why even the quran and hadis must fit this framework because that is the way God made this world to work so he cannot tell us anything which goes against that at all. If you like you can bring any mufti, aalim, scientist, philosopher, politician to refute these straight forward facts but they will not be able to refute them.
Islam we have received is not direct from God and his prophets and messengers but through ordinary people no matter how great they were. There are so many books and so many people in the human world and they differ a lot about things be they scientists, philosophers, molvies or politicians etc etc. So we need such a criterion or standard whereby we could reach the truth about things.
All human beings make mistakes and this is human nature because this is the way God has created us. Think about your own life experiences and you will see how after you came into this world you learned each and everything you came to know. Nothing was easy and you had to ask a lot of questions about things. Staring from what is this and what is that etc etc.
This is why nothing and none can be taken for granted by anyone even the alleged word of God or word and deed of a prophet and messenger of God. This is why we must examine the quran as well as the hadis to satisfy our curiosities or questions which arise in our minds. The indisputable facts I have stated force us to interpret God sent and people provided sources of information in such a way that they show consistency with these like self evident facts. If we fail in doing that then either sources are false or we have made mistakes in understanding them correctly. It does not matter who said what or when because the truth remains true and falsehood remains falsehood if we are able to test and judge things correctly.
Since we know we have needs which we need to fulfil so there has to be a way of life, a rule of law and a governing system which helps us do that in the best possible way. This is what the quran and hadis have to be about. Not about baseless nonsense harmful and destructive beliefs and practices.
If possible then take some time and read through my posts may be you will find them helpful to see what quran, hadis, fiqh and islam have to be about and why and what our rulers, money dealers, mullas and their touts and supporters have made of them throughout history. This is why people who claim to be muslims have no respect at all even among themselves let alone what nonmuslims think about them and why.
People who claim to be muslims yet want to separate islam from a so called muslim society its politics, culture and economy only do so because they see how harmful and destructive mullah islam is even for muslims but they have no idea what actual islam is either.
People are now openly questioning mullah islam and they are also trying to discover actual islam from the quran and rest of sources and that is a very good news. But this is going to take time because they need to dig deeper and deeper. Foolish people have covered up actual islam under many layers of their self invented falsehood in the very name of islam.
Hopefully my this explanation of things you will find helpful.
Meanwhile regards and all the best.