Football has evolved past such definitive roles, otherwise Ole would not be laughing at jurnos who refer to Bruno as an MF or AMF, before he tells them that he plays as a forward/striker.
One's ability can of course skew a role so that the team plays to their strengths like CR7, Mbappe, Neymar, Messi, Salah, Mane - but Rashford has not yet refined his ability.He is currently using selfishness to skew the role. There is a 50/50% chance that it could work as we saw with Ronaldo in his early years, but football has changed so much over the years.
Otherwise nearly all of his English mates who play in the same position are seemingly better footballers at this moment in time.
Yeah that's just nonsense. There are definitive roles, Salah won't be playing same role as Grealish, Salah and Rashford plays similar role, whereas Grealish plays similar role to Maddison. Do you think Bruno plays similar role to Cavani or Fred? Or KdB plays similar role to Fernandinho.
Can Rashford create and play like Grealish? No.
Can Grealish produce numbers like Rashford? No
Can they both play together? Easily.
Rashford is not refined player as he is just 23, how refined were Mane, Salah when they were at Rashford's age? Also he isn't even as raw as people want everyone to believe. He makes few poor decisions when it comes to shooting , dribbling. It's not different that most attackers. People moan about him missing chances, when you check who missed the most big chances, it's always dominated by very good attackers as the most important thing to do is to get into the position to even miss the chance, which great players and very good players get into regularly.