A well-marked, time-limited or centrally controlled minefield is generally much less dangerous, on par with a razor-wire fence. Functionally, it's a sentry system which can be turned off electronically (or by waiting past a certain date), or at worst, which is marked on maps well enough that individual mines can be removed safely by engineers.
Unexploded ordnance (i.e. bombs which you fire and which then fail to explode) are a bigger threat after a modern battle than US-style minefields.
A minefield is probably much less likely to be deployed for this than automated sentry towers, however.