There is no scientific proof that manifestation works in terms of individuals simply wishing something into existence. However, some research suggests that people may manifest positive things by believing they have the ability to do so. This means if a person believes they can achieve a goal such as landing a dream job or purchasing a home, they’re willing to take the necessary steps to make their dreams a reality.

One ethical concern revolves around the potential exploitation of vulnerable individuals by promising guaranteed outcomes through manifestation techniques, which may not always deliver tangible results. 
Author: Elizabeth Michael)

Spiritually evolved people with occult powers have the capacity to create tangible and intangible (but visible)materials which i have seen myself.

For the general public who think just by having a strong thought to create a better future , visualising big houses,cars and financial freedom will help … it is a big trap !

Yes ! people who have a target in their mind, who work in that direction, definitely have the probability of converting it into reality.