Since we’re on the subject of speculatiion. It would be my guess that if the decision to power up were left to a vote from earths populations that the percentage of people voting against it would be closer to 99.99% ....... Call it a Hunch
1) Well, someone sent them 10’s of billions of $, so obviously this is not the case.
2) Most people I’ve met who’ve mentioned an opinion, even those that do not understand the science, are for it. Although that does not prove a majority, it is certainly enough to know the number of supporters is greater than 0.01% of the population.
3) Although there were a few theorists who posited that there were issues at the start about a decade ago, no one who could be expected to know the physics has had any serious concerns once it was determined that cosmic rays were above the energy threshold.
4) Free floating anxiety does not constitute a scientific argument, no matter how many people have it.