7-ghosts don't exist, neither do jinn as most laymen think of them. it is easy to attribute the movement of shadows or whatever is seen in the peripheral as ghost, the more primitive a people, the more they believe such things-no offense-
in Islam, my own view is that jinn don't exist as a separate creation, ie. they have no overtly physical presence, rather they are more or less mental constructs,useful to keep people away from certain actions.
Your view then, akhi, is not in line with mainstream Islam, it is heretical. It lacks any basis from any of the Islamic sources and is based on nothing except your whims. Perhaps you may consider yourself a scholar (as you said those who believe in Jinn are 'laymen'), but you should know that your view is fringe.
The fact that they are a separate creation is clear from many ayaat of the Qur'an, one doesn't even need to bring ahadeeth to prove this point.
{And there were men from mankind who sought refuge in men from the jinn, so they [only] increased them in burden.}
{And, when We directed to you a few of the jinn, listening to the Qur'an. And when they attended it, they said, "Listen quietly." And when it was concluded, they went back to their people as warners.}
{[Satan] said, "I am better than him. You created me from fire and created him from clay.}
{And @ when We said to the angels, "Prostrate to Adam," and they prostrated, except for Iblees. He was of the jinn and departed from the command of his Lord. Then will you take him and his descendants as allies other than Me while they are enemies to you? Wretched it is for the wrongdoers as an exchange.}
{ Indeed, he sees you, he and his tribe, from where you do not see them.}
{But they have attributed to Allah partners - the jinn, while He has created them}
{Likewise did We make for every Messenger an enemy,- evil ones among men and jinns, inspiring each other with flowery discourses by way of deception.}
{And, the Day when He will gather them together [and say], "O company of jinn, you have [misled] many of mankind."}
{"O company of jinn and mankind,}
{Say: "If the whole of mankind and Jinns were to gather together to produce the like of this Qur'an, they could not produce the like thereof, even if they backed up each other with help and support.}
{ And among the jinn were those who worked for him by the permission of his Lord.}
{A powerful one from among the jinn said, "I will bring it to you before you rise from your place, and indeed, I am for this [task] strong and trustworthy."};
