People don't have a 'spending' problem. There are more ways than ever of 'spending money'... even if they're a bit of a scam ie based on paper-currency.

Ask the common person, is it hard to "spend money".... and they'll probably just laugh or look at you funny. "No of course not it's easy to spend"

What's hard for many people is 'saving' money or purchasing power.... especially in a way that's inflation resistant or over long time periods or distances.

That combined with the extremely limited education around Bitcoin among the general public, and that's why Bitcoin isn't used "for spending" even though it can be.