I don't know what to tell you. You clearly haven't studied International Affairs, or at least read the scholarly literature. Even some cursory research through Wikipedia citations will bring this up. But in any case, here are some freebies: https://armscontrolcenter.org/why-tactical-nuclear-weapons-a... https://www.armscontrolwonk.com/archive/403540/brodies-weake...

If you have a real interest in this area, a subscription to Foreign Affairs would be useful. Especially during the 20th century that's where all these arguments were hashed out. Tactical nukes were already being publicly debated in the 1950s. You may be able to access many older articles, from Foreign Affairs and others, through a free JSTOR account.

First link was written by an intern, let's be serious. The second seems to have more legitimacy, ok, so we have this one guy, but the article is very weak. He doubts that tactical nuclear weapons would help control escalation. OK. I don't think that's the center of the argument here. I also think using tactical nukes would lead to escalation, so what? Doesn't change the fact that tactical and strategic nukes are different things.