Some will argue yes, some no
Encapsulating wet, rotten wood w more glass certainly isnt 'fixing' it.
Doesnt stop the rotting process
Doesnt prevent freeze/thaw if wet and cold enough
Makes the stringer more rigid then it is, possibly more rigid then it was originally, which might lead to stress cracks along the stringers
I dont know what site, and please.dont post it, but for some people, cosmetic and less then substantial repairs are viewed as sufficient 'for now'. I choose not to believe in that philosophy.
Unfortunately, not all situations are the same, and remotely via the internet is not the best way to assess a boat for repairs. Some bandaids may work, some may not. Some might last a long time, some definitely wont. Some will be safe, some will not be.
Well done, substantial repairs will work, will last a long time and they will be safe, of that I am confident.