I feel like people have kind of bastardized the original meaning of LeanFIRE. Maybe it never had a good name to begin with, because it sort of seems to indicate "less than", but the concept originally was not referring to just taking your current lifestyle and cutting out everything fun and enjoyable. It was about building a lower cost lifestyle overall that still included everything you wanted, and geared towards people who were more anti-consumer and minimalist and genuinely wanted that lifestyle, not people who would see it as a sacrifice.
For example, some more mainstream FIRE people these days would look at their budget:
$2000 - Housing
$600 - Food
$500 - Transportation
$300 - Bills
$200 - Restaurants
$100 - Cable TV
$300 - Misc
And they would say - Okay, if you cut the restaurants and cable and some of the misc, that's leanFIRE.
But an actual LeanFIRE person would do a budget that looked really different, because they would be axing stuff they didn't care about, while also funneling some of the savings into cool stuff. So for a (purely hypothetical!) experience-focused couple, it might look more like:
$850 - Housing
$300 - Food
$80 - Bills
$100 - Misc
$100 - Video games and books
$800 - Travel and activities (if they couldn't travel due to say a pandemic, they would instead do things like local bungee jumping and whitewater rafting instead)
Interestingly, despite spending way less overall, the LeanFIRE household not only is not sacrificing or living any sort of barebones lifestyle at all, they're doing way more fun stuff than the first household. They certainly would have less luxury in their lives overall, like they wouldn't have a car and their housing would be smaller/simpler, but for people that don't care about those things and have other stuff they'd rather focus on, it's a great way to live.