Not sure what they wanted...

I was in a game a while back and I was just thinking about a situation that occurred and I wasn't sure what my team wanted me to do.

Dear diary;

(I should first mention that I was ) I was at my tower in bottom lane, at about 50% health, and 10% mana (or so). Tresh, my support had just died, and there was a wave of minions a little passed the river bush. Mundo (jungle) ran down river to the bush to come gank, but Lucian knew he was there because Vi (enemy jungle) was in the bush. I used my E over the wall to help, but Mundo ended up dying. My team then questioned why I didn't help. I told them I'm pretty low on health, and have no mana. And that I used E. Mundo tells me I'm "auto-attack based"... No shit Sherlock. I know that. I told them if I went in I would have most likely met the same fate, seeing as how both the enemy champs were at full health. Thresh told me I had a tank there to peel... Okay, but I have a wave of minions I have to walk around to even get to the bush... I told them I had been worried that they could have ulted(Vi), dashed (Lucian), or Flashed. Mundo can't peel if they jump me like that. Even if I got around the minions there would have been two champions between myself and my tank. Mundo can only Q one champion, and his ult doesn't help me survive (Ahri told me if I went in Mundo could peel with his ult and Q). If Vi decided to flash on me I could have easily been taken out. Not to mention that at this point I was already behind, the Lucian had about 4 kills under his belt, and Vi wasn't doing horribly.

I tried to argue my case but everyone else basically told me I was wrong, and that if I went in some how Mundo would have survived and we would have gotten the kills. No, sorry. Mundo wanted me to "try". If I "tried" and ended up dead what good would that have done? I'm not going to put my neck on the line like that when I feel that the risk is too high.

Am I missing something? I'm not above admitting when I am wrong, and was wondering what others peoples take are on these situations.