Earlier quoted context omitted.
Former French president Nicolas Sarkozy did the same. It's quite fascinating to me that you can become so powerful while having such a lame insecurity at the same time.
If they do it in private, then yes you might call it a lame insecurity. If they do it only at public events where they're constantly being photographed in groups of people, it's smart image control. A leader is a symbol, and different height differences project different messages visually. That doesn't mean you need to be the tallest, but being the shortest in every photo may give voters a perception that works again…
The high heels haven't hurt Putin politically since he's a dictator but it's ruined the careers of other politicians like Ron DeSantis.