You don't even need to switch fields. There are plenty of biomedical companies (and what isn't a tech company these days?) and projects that could use some passionate technical people.
I'm not saying your attitude is obviously wrong, but there must be a lot of people whose imagination is captured by making tools and the potential of that to change the world. The development of a tool like optogenetics, for instance, makes me feel like amazing things can be accomplished. It's leverage.
Maybe you and I have different definitions of 'platform' company? I define as a way to iterate to get new products, like Regeneron uses their humanized mice to crank-out mAbs, or Genetech/Amgen use recombinant molecular biology to make mAbs, or Vertex uses their in vitro ion channel conductance screening method to make new structure correctors for CFTR...