> No one decides to marry their spouse based on how punctual they are

Anecdote to the contrary: I've broken off a relationship with someone who was habitually very late, for that reason (and the denial that it was a problem).

One of the things that I really like about my current partner is that they are habitually very punctual, or early.

> No one decides to marry their spouse based on how punctual they are.

Not their first spouse at least.

Not like you'd get anywhere any faster when there's traffic around. Punctuality is a sign of planning, and that's a desirable trait, so I don't know about no one.

People who are punctual tend to be reliable in general, so maybe it's not a bad idea?