Pretty much. There's other things they teach you in Aikido, like a standing armbar but your back is to your opponent then. Against any trained fighter, putting your back to your opponent is just a bad idea no matter what. There's strikes you learn in Aikido as well, but my knowledge of that is lacking so I can't say much about that. I've only seen what Seagal does and it's like slaps and kicks, but it wouldn't be very effective against a trained fighter, again. If the techniques are adapted correctly then sure, but Seagal himself is not doing any damage, lol, maybe some other Aikido specialist that's in better shape and has learned other effective martial arts and they mixed their Aikido skills with it and adapted it to real fighting and such, but that's easier said than done. It's like that in all martial arts, especially traditional martial arts. There's specific martial arts like muay thai, boxing, kickboxing, BJJ, wrestling, sambo, etc, they are known to work in real fighting, but with karate, TKD, etc, it can be effective but it depends who you're learning from most of the time nowadays.
There's so many "McDojo's" out there where it's supposed to be 'fun' instead of actually learning. The reason it's like that is because actually learning karate, TKD, etc, it's not easy to do, just like boxing, muay thai, etc, is not easy. Actually learning to fight takes a lot of dedication. The old martial arts movies created these McDojo's because people saw their favourite movie martial artists beating everybody's ass, so it opened up the market for these lame ass fake schools and made it fun because if they were really learning these martial arts, many people wouldn't go back because it's harder than they thought it would be. Firas Zahabi explained it very well. In my opinion, Aikido is too easy to defend against. You need to get a hold of your opponents' wrist/arm to do any damage, but in a real fight that's not exactly easy to do unless your opponent is stupid. Odds are you're gonna get cracked in the head long before you can get control on their wrist and fuck them up with some wristlock or some shit.
This is why BJJ and Sambo are great. You don't just grab their arm standing up, you take them down, completely out of their element and fuck them up from top position or from your back if they get on top of you. I don't know if Aikido really does much in those aspects (on the ground), I just think those techniques by themselves would get you killed in a real fight because just reaching for an opponent (moving your arms away from blocking your head) is dangerous. Like Bas Rutten said, Aikido is just too easy to defend against and if they get a hold of your wrist/arm, how are they gonna stop you from punching them with your other hand? There's too many holes in Aikido by itself in terms of defense. Again, I'm not all that knowledgeable in Aikido n shit so I'm likely missing a lot of things about it, but against an MMA fighter? especially somebody in the UFC.. the Aikido guy gets killed, especially Seagal, both when he was a skinny as fuck and today where he's fat as fuck.
/rant