1. Goku says he wants to fight the Androids, what were the others going to do, go against his back?Lord Beerus wrote: They are so many example of stupidity in the Android/Cell arc:
- The Z-Fighters refusing to take Bulma's advice and use the the Dragon Balls and wish to Dr Gero location and stop him from activating the androids
- Piccolo powering up and allowing Cell to locate #17
- #17 not running away when #16 constantly shouts at him to do say resulting in him being absorbed by Cell. Made even worse by the fact that #17 witness Cell nearly kill Piccolo, so why he thought it would be a good idea to stick around is just asinine.
- #18 not running away as far as she can after witnessing her brother being beaten half to death and absorbed by Cell and knowing she next to be absorbed by Cell because... reasons.
- Vegeta being a stupid asshole and allowing Cell to become perfect
- Krillin not shutting down #18 and preventing Cell from becoming unstoppable because he had the hots for her.
- Goku not tell Gohan about his plan for defeating Cell prior to the Cell Games, instead relying an immense amount of luck and good fortune.
- Goku giving Cell a freakin senzu bean
- Gohan not killing Cell because he was OOC.
2. How was Piccolo going to fight 17 unless he powered up? They were shown to be almost equal in their battle.
3. I'll give you 18 standing around too often like a fool, but they did say Cell would spot her if she tried to fly. Still I suppose this one was nonsensical of her just standing around with a blank look on her face.
4. Vegeta allowing Cell to absorb 18 was perfectly in character. Vegeta wanted to test out his new strength, and at the time he thought Cell would be the only villain to test it against. Vegeta doesn't want an easy victory, he wanted a challenge to prove his worth.
5. Krillin not shuting down 18 made sense if you were in his shoes, even if it wasn't the best decision. He still intended to run off with her even afterward.
6. Again Goku giving Cell a senzu bean is idiotic, but its not anything Goku hasn't done many times before.
So really, aside from Android 18 standing there too long instead of running away, everything else made perfect sense.