Indeed, but as it will only trigger @75%, the tipping point will have been reached and the majority of undecided nodes are unlikely to remain on the lower hashrate chain.
I don't believe you have really thought things through with regards to the possible attack vectors that large btc holders can have. First of all a 51% attack created by 75% of the hashing fork cannot steal individuals coins that are not being spent on the minority chain and the hashing majority has no idea which wallets are friend or foe. Large bagholders (almost all the core team and early crypto-anarchists who tend to prefer conservative implementations that prioritize security and privacy above mainstream adoption) can carry out some pretty nasty attacks where they can quickly devalue the chain with the most hashing power scaring all the miners to support their chain or they can simply quickly and secretly buy up mining farms and ASIC's and attack the main chain without risking any of their investments.
In fact, this course is a much more likely course that could occur over them changing the PoW algo.
Do I want any of this to occur?... of course not, I am not bitter and believe that our values are more similar than different and we will indeed find consensus soon. Our priorities are probably slightly different as all and there can be eventual reconciliation. It would be better to insure for everyone's sake that their isn't a civil war, which is why the 95% threshold is so important as it almost guarantees consensus will follow.