I am not a fan of treating. But then, I am also not a fan of letting them die.
If I have bees prone to getting sick I try to find them a batter queen.
Treating them so they don't die, and getting them a different queen is a lot easier than installing a new package.
I understand the tough love theory, and I accept that it WILL work over time. I just don't have that time. WIll I live ten more years? Twenty? so if I do live 20 years, that is 20 more springs to do splits. 20 times I need to prepare them for winter. 20 times I can hope for a honey harvest.
In the meantime, if I am losing them to problems I could have fixed, I also lose time I can never get back. SO I treat, and I give them a new queen to see if she brings about a healthier hive that doesnt need treated.
I also use things that I hope do not build up int he wax, like Oxalic Acid and HopGuard. Then I make sure to rotate their wax so its not over three years old.. that certainly cuts into the honey I would get, but feel that it gives them a healthier comb and hive with the neonics, pesticides and fungicides they are exposed to here in farm country.
We all have to raise our bees how we think is best. Just consider the time and expense involved, and remember it is limited. There comes a time to give up on a weak hive. Combine it and start fresh. If I can limit the amount of times I have to start fresh it gives me more to work with in the time I have left.