Alcaraz may seem a size too big for other tennis players at the moment. And to think that we haven't even started the gravel tournament in Europe yet. So that will soon be even more in favor of Alcaraz, I suspect. It is also possible that we will only see Nadal for a few more games. I think he just wants to play tennis at the highest level. Sinner is also a huge talent, but the question is whether he can seriously compete with the real world top. He seems to be just below that at the moment. Especially if you compare him with Djokovic and Alcaraz, for example.
Alcaraz is without doubt the most talented of all young players at the moment. However, that doesn't mean other players can't get closer to him. There are several ways to become number 1 in the world. Roger Federer and Murray are good examples of this. Federere is a player who was incredibly talented, perhaps the most talented ever. But Murry managed to beat him a few times because he worked harder for it, trained harder but also put in more effort to win points. You can go far with a fighting spirit. And Djokovic has both, which is why he has won so much.
It is normal that even the best players in the world can not win all matches. Nadal is the best ever on Clay and his record on Roland Garrod will probably never been broken but also he lost (2 times I think). That doesn’t mean he did put less effort in but sometimes you have a less good day and your opponent has the best day of its life.