It is not completely wrong to compare players because even the players also compare themselves with eachother. Lamine Yamal is a good example of a player that should be compared with other players since he usually do that often times. Lionel Messi started somewhere and at this age he wasn't bothered about comparing himself even though he had his role models like Maradona, he only focused on his work unlike Yamal. He has gone to the extent of challenging Someone like Ronaldo, someone who has taken years to build his reputation.

Also, it is not all wrong comparing them because it can also help to push the players to be better than they were always. Yamal is good and if he is sensible enough, he will stay humble and know if he can achieve a quarter of what Messi and Ronaldo have achieved.