Earlier quoted context omitted.
> "It's complicated so we shouldn't try is basically the excuse." I think the actual criticism is more along the lines of "It's so complicated that it's incredibly unlikely this guy has been truly successful." > "Let the pioneers have fun and play and learn, that's what I say!" Which is all well and good when they're merely experimenting on themselves. But this guy has gone from tinkering to claiming success and safe…
Or even "It's so complicated that it's certain this guy fails." We know for sure that he can't include all the stuff that we know that exists but for which we absolutely don't know how we can avoid eating the real things.
What we don't do is go all "hurr durr it's too complicated, let's not even try".