The most expensive component in a ski boot is a linerAnd there is exactly the issue with most stock liners in consumer boots. They just aren't designed for easy out/easy in. There's too many places where they will catch on the shell and wear or tear. I wish manufacturers would put more thought into their designs when it comes to day-to-day operation.
It’s Hand sewn expensive labor
So guess where they gonna try n cut costs
Hence zip fits