You’re right, what we really need in this situation is VARYou are acting as judge and jury here. You state that Brown and Arthur's actions were similar so did you witness both incidents in person including the full context, the build up etc.? Or have you formed your opinion based on some snatches of mobile phone footage posted on twitter ? A very dangerous assumption to make, as evidenced on Match of the Day tonight. The was a mass melee in the match between Man U and Palace resulting in Casemiro being red carded for violent conduct which will result in an automatic three match ban. The VAR officials had brought a picture to the ref's attention which appeared to show Casemiro restraining Palace's Hughes by means of a choke hold around his neck. MOTD analysis showed footage from another angle which disproved this, and that in fact Casemiro was holding a grip on his shirt collar and was not in contact with his neck at all !
I would suggest that you leave judgement and sanctions to those who have access to greater knowledge of what has actually happened, rather than jumping to uninformed opinions.