It's not same shit. Stop painting everyone with same brush. Plenty of us who are not convinced with Arthur.
About Arthur, you can't neglect a history (and we can't say: our boards or scouts were stupid back then).
These are ALL Barca's signings since 2000 when a young player came STRAIGHT from South America (zero CL/senior NT/La Liga experience/Europe experience) to Barca:
2002: midfielder Fabio Rochemback, age 19, huge fail
2002: CF Saviola, age 19, never reached high expectations to be one future leaders of Barca (price 100M+ in a current market)
2002: winger Geovanni Deiberson, age 21, extremely expensive fail (something like 80-100M today)
2003: Cam Riquelme, age 24, fail
2003: fullback Sorin, age 26, mostly fail
2008: defender Henrique, age 21, no comment
2009: Cf Keirrison, age 20, no comment
2014: Rb Douglas, age 24, no comment
Can I add Marlon here?
2002: Gk Bonano, aged 31
So, I looked even back in 90s, to see whether we had more success:
1998: Cb Pellegrino, age 27, loaned for one season, we didn't buy him after that
It seems that the last successful transfer of a player coming straight from South America was from Giovanni (not Geovanni from early 00s) in 1996'.
So, basically in the last 20+ years, only 2 players straight from SA made it at Barca: Neymar (the best young player in the world back then) and Geovanni in 1996.
So, people here are often making jokes how Arsenal players are always a fail when we buy them.
Or how Valencia's players are also a fail.
On the other hand, our record with players coming STRAIGHT from South America is worse than a record with Arsenal's or Valencia's players.
The only "pro" for buying Arthur is a hope that according to numbers, sooner or later, one day we'll hit a gem (from the 1st or 21st attempt, though).
Instead of paying 40-50M for unproven Arthur, it would be wiser to pay 50-80M for some midfielder who played well in Europe for 2-3 years.