Since I do not know you and have never heard your work I have no idea what your actual abilities may be. However I can tell you that I have heard this same line many times before.
I have known many singer songwriters who have expressed this same belief. Most have had a trunkful of dozens or even hundreds of demos no one ever bought. The main reasons for their failures are having a limited vision of themselves and the resistance to growing as a person in a professional manner.
The people I have met who have had this expectation usually are very poor musicians. They are writers who play instruments only well enough to back themselves. Without professionals backing them and a major money source behind them, such as a record company, they never make it past the bar scene or out of their bedrooms.
The really famous songwriters, like Paul McCartney, Paul Simon, Billy Joel, & Stevie Wonder, who really make it big do so because they are big people who think big, dream big, and are actual musicians who can play anything or produce anything not just their special baby which is their song.