That bugs me, too... “Boil Water” - yeah - how? is what many will ask.
Only once have I heard mentioned, purification tablets or bleach, and then they didn’t say how much bleach to use (~1/8 teaspoon per gallon (2drops/qt) is fine but more won’t hurt ya’ )
Sometimes these things just drive me nuts
You forget that most Texan of backyard activities - the barbeque. Almost all Texans have a BBQ unit of some kind. It usually operates on a self-contained gas supply, wood, charcoal, or some combination of the above.
Fire boils water just fine.