It's a little weird, but did you really expect a whole-ass airplane to just be scrapped when its owner dies? It's just a charter plane now and anyone with the means can source it.
Sure, it's just a plane at a reductionist level, except that living thinking people can associate that plane with who owned it and where it had been in ways that clearly persisted and that is entirely why it is being talked about now.
It's like scoffing at people that'd feel uncomfortable renting a house that was the site of a mass murder. Or maybe building some suburbs over the sites of atrocities/mass graves, which is kind of popular right now in some parts of the world right now.
Ehhh, there's a whole lot more involved in the history of quite literally paving over atrocities. This is more like renting the home of a serial killer or something.