I used to call it 'The Lexus Paradox' - people are drawn to the brand, at least in part, due to the reputation for reliability and then worry about whether it will be reliable.
However, I look at it as an insurance policy. We all have car and house insurance but yet we hope to never have to use it, so a Lexus Extended Warranty is no different. Trouble is, if any spares are needed they are so eye-wateringly expensive that a warranty can recoup its cost in just one or two events.
For example, someone on here had condensation inside both headlamp units if I remember correctly. Being LED they are sealed units so both were replaced under warranty and they cost over £800 each side.