it's just that though--an analogy. RCX is easily accessible and not hidden from anyone's view. It's advocated on the official fan page. Newer players won't know about it initially--that's true. But newer players (and some older players) don't know the value of green pots in war. So, if you feel you're at a disadvantage, you adapt through experience. So you go download RCX or you walk your ass to the shop and buy green pots. It takes about the same amount of work, really.
I agree, mechanics should not be broken and we should have a lag-free game, but those should be fixed server-side. I shouldn't be forced to download a 3rd party program to be evenly matched with other people.
I really can't say much more than that. I've never cared much for RCX but at the same time I've never cared much about people using it since it was considered against the rules. Now that the policy is changing, though, it's like Gravity saying that you need to have this 3rd party program to be evenly matched.
As for the green potion analogy... Green potions are an in-game item. For the situation with RCX, I think it would be better to say that you need to bring *insert other-MMO item here* to not have a disadvantage. RCX and RO are two completely separate things. I really hate downloading 3rd party content to play a game when those features should really just be included if they were meant to be there.
You're right, some people don't like going off to download another program. Well, some people don't like walking into town to buy green pots either. ;D
So if you feel you're at THAT much of a disadvantage, do a little research..
Even so, the advantage you get from RCX isn't game breaking either. This isn't Autopot or autoTarget or autoBwing. I played without it for months. It's just convenient for when you need to turn effects off (and for leveling).