It’s worth noting that the Maharsham has a teshuva permitting smoking a cigarette on Yom tov even when there’s writing which will be erased through the burning
He basically says like the dagul mervava but is slightly more lenient.
He says that erasing when it’s not possible to write us even better than mochek sh’lo al mnas lechtov.
There are poskim- Dayan Fisher ‘even yisrael’ among them- who use this as a reason to be lenient regarding ripping through letters on wrappers on Shabbos.
I saw the sources inside years ago when we learned these sugyos; I’ll try and get the exact sources to post.
And obviously everyone should consult their posek.
But it’s worth raising this as an additional relevant source.