To put it bluntly, it is because only Putin can deter Chechnya now. Once Putin steps down, the new leader may not be able to stop it, so this problem must be solved before Putin steps down. However, the problem of driving distance is complicated now, and it is very difficult to completely solve the problem of driving distance. At present, Putin can only take repressive measures to solve this problem, but even repression can only be temporary.
In fact, Putin was able to get the support of many Russians, mainly because in the second Chechen war, Putin directly defeated these separatists. Moreover, in the next ten years, anti-terrorism activities have been carried out, so at that time, a high WeChat was directly established. Facts have proved that Putin's method is still very effective. Putin used some contradictions in Chechnya to divide and win over Kadyrov.
After Kadyrov was secretly killed, Putin directly put his son in the upper position, and a lot of financial subsidies will be given to the Chechen government every year. So on the surface, Chechnya is very grateful to Putin now, but in fact, little Kadyrov's own ambition is also relatively large. For example, little Kadyrov has always been in arrears with the Russian government's natural gas fee, and little Kadyrov himself made his own decisions and signed a document with Yunus Yek Kurov, which was actually not approved by Putin.
So, to sum up, little Kadyrov is not completely obedient to Russia now. Once Putin steps down, he will definitely rebel, so the first task of Putin's reign is to solve this problem first. Of course, Putin will definitely not choose to get rid of little Kadyrov, and the best solution is to suppress it.