People thought the same thing about apple when Jobs died but it's up 900% in the 9 years since his death
Capital has very few "good" places to be allocated at the moment - really for the past decade or so - and COVID-19 put everything into hyperdrive for the tech sector.
Economics Explained on YouTube has a good video about this.
Low interest rates means that people will search for yields elsewhere, it doesn't intrinsically mean they would settle on Apple outside of solid management.