I know Harry Kane is a good player but I find it a little bit exaggerated to see him as the unique choice that many teams are chasing starting from EPL teams to La Liga (Real Madrid) and Bundesliga (Bayern Munich) ones.
Kane literally ruined his career when he agreed to extend his contract with Spurs and there is many players who require more attention
I disagree, he is still a great striker with a great talent to score goals and there is absolutely no way that he lost any of that talent. The problem could be money and maybe he doesn't worth as much as Spurs wants for him, I can definitely agree to that part but that doesn't make him "bad" at all, he still is a level of talent that can play in all the best teams and he has been like that for like 5+ years now, so the talent to play is there but money could be questionable.
This is why the part I agree with would be finding either cheaper or even better talents, either you find someone better than Kane, or you find someone that is cheaper and close to his talents. Osimhen is the same, he definitely is a great striker, but not 180 million euro worth at all.
The problem is his age and investment required to get him. I mean would you get a "great striker" for 100 million if he is 30 years old? I personally wouldn't, that kind of money should be reserved for players who have a future, when you buy a 23-25 year old striker for 100 million that means that player could either play for 7-8 years at least, maybe even 10 years for you, or they could play a few more seasons with you and then you can sell them for even more later on.
I think the value at age is the amount of seasons you can give to a team. Technically speaking a player that is 30 but plays great for 10 years would worth 100 million as well, but nobody sees that possibility with Kane obviously and that is why nobody wants to pay that much for him.