The thing that always seems to get lost in these discussions is the Why you are doing what you are doing? .
As usual Kevin has sumi otoshi'd the correct.
You see I rarely see MMAer, BJJers, whoever, say anyone should just stop practicing Aikido. What I do see is them challenging people that Aikido will not give them what they think it will. The debate is more often about what aikido is good "for". Sometimes that's explict sometimes it's not. But it's generally what the debate is about.