If you actually think the timer is a total non-issue I'm guessing you don't solo much. Obviously things are gonna die fast with 4 players online in the portable games.
Off the top of my head, memorable timeouts for me in recent years -
- Was rushing through MH3U village when it first came out and trying to fight a high rank Duramboros naked with a low rank hammer didn't go well.
- Just jumped in solo against Dalamadur to see what the fight was about, I had never even seen a picture of the thing. Wasn't expecting to win but good lord it has a lot of hp.
- Tried to solo some high level Dreadking with the wrong weapon. He is an asshole and barely ever touches the ground.
I've had some pretty intense moments due to the timer. Like when my entire group ragequit after 2 deaths early on the first time I fought Alatreon for my urgent. I just fought it with my crap sleep SnS, no bombs, and it fell over dead with under 30 seconds left.