...and you would do well to learn what that technical critic and lead astronaut of the Apollo Program, Gus Grissom, and Wernher (note spelling) von Braun internalized as Gus, Ed and Roger learned in the oxygen-fed conflagration that incinerated what would be dubbed Apollo 1.
Yeah ... don’t use a high pressure pure oxygen environment. It makes everything flammable.
Now ... do YOU get what Mercury and Gemini were all about?