Earlier quoted context omitted.
We all have our faults. But we don't need to promote them. There is also no "t" sound in "often", never was. Some officious busybody thought "offen" and "oft" ought to be related. so put "often" in a dictionary. Now people who don't know any better pronounce it. But it's rare to find anybody trying, foolishly, to say the "b" in debt and doubt. I doubt anybody tries to pronounce the "l" in "could". That one appears to…
There very much is a 't' sound in 'often,' but it depends on how you talk (whether or not there was before, language changes). If you're saying native speakers are saying it wrong, then I don't know what to tell you.
In some times and places it becomes normal.