We may find it hard to believe, as a bunch of hardware nerds who spend our days in online Apple forums picking apart everything Apple does, but outside of this world, Apple products have a cachet that hundreds of "me too" Windows notebooks can't match. I'm sure there are a lot of people who would love to jump into the Apple ecosystem--liquid glass be damned--if the barrier to entry were just a little lower.
Apple is a shrewd marketing organization. I'm sure they've thoroughly analyzed the incremental sales they can expect at $599, $549, $499, etc., and are positioning the low cost MacBook to maximize profitability.
(Full disclosure: I have nothing against liquid glass or macOS 26 Tahoe.)