It is said to be common sense for adults
to separate wallet and card case use.

I agree.
When you stuff whatever into a wallet
it is kinda like a lunch pack sandwich
about to burst
all stuffed.

That is something you really want to avoid
so for me I put business cards in a card case
and a money clip to bundle cash and credit cards.

Porter’s money clip
is a leather wrapped steel clip
and for an accent
there are beads threaded onto a leather strap
for the design.

When put inside a pants pocket
it falls into place good.