Isn't a weakness to poison redundant?

The world of the Jumanji game seems to make a distinction between being killed physically and being killed by a weakness.

At the very beginning, Brittany is eaten by a Hippo. It's not until she is physically dead that she is respawned. On the other hand, when Fridge accidentally eats cake, he dies by immediately exploding (the movie draws it out for comedy, but it's functionally immediate) and respawning. If we assume that Ruby did not have poison as game weakness, then what would have happened is that she would be poisoned, then die painfully as a normal human would, then respawn. Instead, she immediately implodes (idk why it was different for her than for Fridge) and respawns.

In video game terms, it equates to an instant-death condition as opposed to dying from health loss.

I thought this too, and my best explanation is that most venomous snake bites are not (immediately) fatal. However, Ruby Roundhouse is guaranteed to die from the snake venom due to her weakness, even if most other people would only get ill.

I completely agree with ViggyNash's answer. To add a few points though -

• considering the urgency and seriousness of the scene, had Ruby not had a weakness for venom, she would've died slowly, which wouldn't have been any helpful because as you recollect, as soon as she comes back and dropping down, she gives the jewel to Rock's character midair.

• the characters death are shown differently for a reason. Fridge's death was an explosion to give a comic effect. (As he unknowingly eats the cake and in the next scene, boom!) Now in all the seriousness, had Ruby too exploded, comic effect is far away, that whole scene would've been wierd to watch for some.

Many of the games (most of them actually) have different types of death when being killed, eg. getting shot, being exploded by a grenade, etc.