Their experience is relevant. If they're being brought into build data analysis systems to make sense of data of various organizations there's zero chance they've worked on a project of that scale let alone do they understand all the gotchas you need to deal with working on a project of that scale.
You're offering a completely false dichotomy here.
Yet it is encouraged that everyone votes (distributed system affecting the lives of many) and are given weapons of war to kill people (military, cops).
We have a minimum age on the Presidency. They work at the discretion of their employers.
You're offering a completely false dichotomy here.