I included my doubts using question marks. I need to rephrase "hopefuls", "disposable" and the last sentence. I really hope you can help me.

1) Craig Jones is not only an office worker, but he is also a talented singer who dreams of becoming a star.
2) He has already won a local talent contest and today he is auditioning for the UK’s biggest TV talent contest. He has been waiting outside for two hours with thousands of hopefuls (synonym?).
3) For this reason, talent shows can have a bad influence on young people.
As a matter of fact, X Factor winners still haven’t had experience of the music business when they become famous and sign a contract.
4) Critics believe that talent shows are simply big advertisements which create publicity for the winning act and song. Though the song goes to Number 1, the winner can’t often repeat the success of his first hit from the show.
5) For the producers, that doesn’t matter because people haven’t lost interest in the show’s format yet, and the next disposable star is already in a queue outside a TV studio somewhere. (I need to rephrase this last sentence).

1) Perfect!

2) He has already won a local talent contest, and today he is auditioning for the UK’s biggest TV talent contest. He has been waiting outside for two hours with thousands of aspirants.

3) For this reason, talent shows can have a bad influence on young people.
As a matter of fact, X Factor winners still haven’t had any experience in the music business when they become famous and sign a contract.

4) Critics believe that talent shows are simply big advertisements which create publicity for the winning act and song. Though the song goes to Number 1, the winner can’t often repeat the success of his first hit from the show.

5) For the producers, that doesn’t matter because people haven’t lost interest in the show’s format yet, and the next short-lived star is already in a queue outside a TV studio somewhere.

1) Craig Jones is not just a regular office worker, but also a talented singer aspiring to become a star.

2) He has already emerged victorious in a local talent contest and is now auditioning for the UK's largest TV talent competition. He has been waiting outside for two hours with countless individuals hoping to achieve the same goal (alternative term: aspiring contestants).
3) This is why talent shows can exert a negative influence on young people. In fact, X Factor winners often lack prior experience in the music industry when they attain fame and sign a contract.
4) Critics argue that talent shows fundamentally serve as prominent marketing campaigns, generating publicity for the winning performer and the song. Although the song may reach Number 1, the winner frequently struggles to replicate the success of their initial hit from the show.
5) Regardless of these criticisms, the producers are not concerned because the audience's interest in the show's format remains unwavering, and another fleeting star is invariably queued up outside a TV studio (alternative expression: eagerly awaiting their chance) somewhere.