Most of that space is from the IDEs themselves, which seems about right. These are giant applications that have grown continually for 20 years, have lots of plugins with them, and they bundle their own version of the JDK with themselves.
And for an application like IntelliiJ, this isn’t too bad; IntelliJ Ultimate’s size is comparable to XCode, and the other IDEs are considerably smaller than XCode. It is not going to compete with VSCode or other lightweight text editors for disk space, because it’s goal is having lots of stuff built-in that would need a plugin from VSCode, so it bundles a lot more than those lightweight apps do.