Nobody and I mean nobody is going to get their recovery machine for that little bit of gas not even Mr. S. Be honest sir ain’t nobody watching or sneaking up on you for 2 p.s.i. Of gas. lol
You are definitely correct, I worked in the field before and during schooling and I feel I learned more in the field than in school. Although in school they will/might show/teach you key fundamentals, safety and tricks you may not learn in the field. Good on you for learning the trade though and good luck 👍