I think it does maybe highlight an issue though because with the very special club and very special team it seems to possibly say he should be grateful to play for them.
and IMO there are no clubs that are anymore or less special than any others - some like Newcastle/Leeds/Leicester are one club cities and that can give a different feeling in some respects than others and they do have a stadium with a amazing atmosphere and great fan base but that doesn’t make it anymore special than any other club
and taking sentimentally out of it football(ers) can be mercenary with the desire to win trophies and play as high up in your career as you can even homegrown players like TAA and Mbappe move on to do so.
and added to that some like Luis Diaz strive to get the most money they can whilst doing so - the need to outrun humble and poor beginnings but maximising earning potential whilst they can. It is the ethos at the heart of the Saudi league
and you can see from his perspective he has probably reached the limit of what he can achieve at Newcastle in terms of winning a trophy and his wages and wants to move on because he isn’t a sentimental man and for him it is his career and his job.
If he does move now to Liverpool will in 2-4 years he want to move on to either RM or Barca or to the Saudi League (if they will have him) yes possibly and so what
because at the start of the last season you could see Salah and Van Dijk staying and TAA leaving because the only thing I think that does keep them is family - children settled within the school system for whom a move abroad would be tricky and even then there are workarounds (Colleen Rooney highlights this a lot with both the move to Washington and how it worked with Plymouth).
Though Isak had handled this incredibly badly (and hasn’t handed in a transfer request though can you?) Newcastle need to let him go if a reasonable fee agreement can be reached as destroying his career by keeping him on the bench isn’t a good look