Aye, it generally means ‘I’ve reached mid 50’s, realised I’m actually pretty shite at this MTB lark, and in my time poor, cash rich life, driving somewhere awesome is really not an option.
Maybe, although for me gravel bikes have genuinely given me a new riding experience.
I do feel that gravel riding is probably the future of road cycling,
With the roads becoming increasingly congested and therefore dangerous more and more people want to get off road, but as you say many will not and may never have the skills to fully enjoy a trail centre, and for whatever reason do not want to ride a MTB.