Because it do not see a reason why it should be cleared faster than it is build.
It seem to you main issue is clear the minefield under fire and that has little to do with clearing time.
Clearing mines under fire is dangerous for all factions.
thank but I didn't see a build time and defusing times are relevant.
Like I said. Other mines if you know where it is you just 1 hit = clear.
only minefield doesn't. It took to much time to clear.
If I have 1 unit which have 15 minute build time. and you need 20 minute to deactivate it. what do you think? for me I just build it in safe place with heavy cover.