The uncharitable perspective: This kind of attitude makes long term relationships harder. If you have severe uncertainty about your future with someone, why should you buy a house with them? Or make mutual sacrifices for the sake of mutually desired goals? Why should you not seek someone who seems to be more determined to spend a long time of their life with you?
The charitable perspective: These people have been hurt by the unrealistic expectations of how romantic love is portrayed in media, and are now overcompensating. This may lead them to not to live their best lives, but it protects them from falling into an inescapable pit.
Both extremes have their dangers.