lonergan was 78 years old. Not 25 and in his prime and could be going to Celtic / Bournemouth and playing week in week out.
he won’t really get to play with WC players because he won’t play unless Hendo Fabinho get another injury
Usually I'd be with you in this but I'm not this time. It's a chance of a life time for him he'll get to play for a top club and in the CL. If he does well, he's got a chance of making making it a longer term deal (you've got to believe in yourself), if not he can go to clubs like that after. If anything having "played for Liverpool Football Club" on your CV is going to help him.
