I need help with end game decision making.

So this is a "what would you do?" question. I make this forum post because it seems to happen more than I like.

So we come to the end of a game, we are fairly ahead. We just ace the enemy team, but we are low on life, and right near baron. Now there are 3 different plays we can go with. Play 1, is we can try to rush down their base as 5. It was a long drawn out fight, so the enemy might be back up before we can finish the game. There is an open lane, and 2 Nexus turrets left, but it is still a risk. Play 2, the Ultra safe play. We can just go take baron as 5, heal/buy then push for the win together. This is an ok play, but you don't gain as much as you could from it. Still a play option none the less. Play 3, is the split focus of objectives. Where you take your jungle and adc, to take baron; while your other 3 teammates push and take 1 of the nexus turrets. Then you all back, heal/buy and pressure for the win. Now this is semi risky (homeguarded enemies coming up), yet still fairly safe.

Being that I like calculated risk, I choose play 3. We would stand to gain the most from it while still being relatively safe, at most it would add 5 mins to the game for an extremely high chance of victory. Though it seems almost everytime I call for/ put this play in action, my teammates get blood lust in their eyes and they try to end the game. Almost every time they do this, they almost end it (very rarely they do), and the blame comes back on the ones who were "doing baron instead of pushing". Yet they seem to ignore the fact, that without the buffs that baron gives i.e. health regen/damage; they would not been able to push threw that fast too begin with.
Now again I ask, am I doing something wrong here? Should I suicide push for a 50/50 chance at a win? I feel like if they would just follow Play 3, it would add the MAX of 5 mins for at 95% chance of a win instead of 50/50, but that seems like it is just too much to ask sometimes, when they can just "END THE GAME!!"

All input is greatly appreciated. (Playing at mid gold level for those wondering) Edit: I would appreciate upvotes on the post it's self, so we can get more people in on this.

Scenario we are working with: 40min ace; All 5 alive, but with low health; Baron is on the board; You have mid tower/inheb down; Your supers are at your mid lane tower; Both nexus turrets up; Long fight, their jungle/apc will be up in 30/35 sec; Top/Bot Tier 2s still up, but your minions aren't close to them.

Edit: Woah this got allot more response than I thought it would, and helped me a bit. I am thinking about starting a new post series here with "Scenarios" for people too tell how they would handle it, could really help some players with play making.