Interestingly from Socrates until a few hundred years ago, spontaneous generation was an accepted “scientific” theory of life. Then, through careful experimentation, spontaneous generation was discredited and no one believes in it today. Abiogenesis, though, is another matter. That’s spontaneous generation billions of years ago in an atmosphere and under conditions totally inimical to life.
Except when the term is being used as short-hand for the whole naturalistic process as is common in everyday discourse about the subject.
Regardless, abiogenesis is unscientific hokum too, so it doesn't really matter.