(Of course “Turkiye” becoming a member of Nato in these times would have been a joke considering Erdoğan. But maybe I’m just showing my naivete.)
Georgia, Syria, Libya, Azerbaijan, Kyrgyzstan, Tajikistan are all places Russia and Turkey banged heads one way or another. Just like Russia is taunting NATO to bang heads in Ukraine. China, US, India, Pakistan, Israel, Russia, Turkey are other powerful countries constantly putting out a fire and starting another one. The single larger difference being that the sphere of influence of most of those countries expands far less than US' so their conflicts are generally closer to their actual geographic border rather than on the other side of the world. Otherwise they're all fighting to maintain that buffer in all possible ways.
And at a completely different scale, people in rich neighborhoods rarely accept inconvenient buildings or neighbors right next to them as long as they can do something about it. It's not an indictment on either the people or the countries named above. Just the state of things.
Perhaps the only place with nukes and no sabre rattling today is Western Europe. Then again they have the US to do the rattling for them and pay for the service. The picture will be a lot clearer when this too becomes history.
However, the idea that all superpowers inevitably go to war to preserve this state is just wrong. If you consider superpowers starting from antiquity to today, the only state that has achieved this situation (at any point?) is the USA. Every other has had at least one significant land border with an adversary.
(PS: Probably the biggest one is, of course, between the USSR and China, which was a very hot border since the sino-soviet split).
PS: it was nice while it lasted... https://www.newyorker.com/news/daily-comment/russia-and-chin...
Not to burst your bubble, but the USSR accepted Turkey with nukes on their border, and before them, Japan. China accepts being essentially surrounded by hostile powers, many of whom are part of NATO.