Here's the first of many.
The maximum allowable altitude is 400 feet above the ground, and higher if your drone remains within 400 feet of a structure.
One guy was upset because he couldn't fly above 400' with a 1600' tower.
I took the above straight off the FAA website. Seems the FAA does not like you making divets in the ground or other things.
The other. Cannot fly in class D. Fist Class D is a tower controlled airport. Limits are 4 nautical miles from the geographical center of the airport not 5. You can fly in that area if you contact the controlling authority I.e. The tower and request permission. The have the authority to grant that permission and will usually be accommodating if approached properly. I.e. Explain the purpose of the flight altitudes etc.
DJI has a policy where you can request a waiver or exception to their policy of not allowing the drone to takeoff in controlled airspace. This can be granted for a period of up to 30 days. I regularly take photos of aircraft at airports with towers. It is not a problem if you know how to do things.
Maybe I missed it, but I cannot see a post in this thread about a 1600 ft tower. But since you could not be bothered to include a post reference I'm not going to spend much time looking.
Class D radius is generally 4 nm, but it is variable. The nearest Class D airport to me has a 5 nm Class D, for example. You should have checked before making that blanket statement. In any case, that has nothing to do with the 5 sm radius guideline for Part 101 recreational flight, since that was set arbitrarily and is not determined by airspace class.
If you are flying recreationally within 5 sm of an airport, independent of the airspace class unless it is surface Class B, then the requirement is to notify the airport operator and tower. They cannot grant permission, but they may object to the proposed flight.
If you are flying under Part 107 then the requirements are only determined by airspace class: flights in Class G are allowed; any other airspace class requires an FAA authorization or waiver, which they have stated must be requested through the online portal, and will not be granted by local ATC.
Since you did not state whether you are flying Part 101 or Part 107 your statement is somewhat ambiguous, but either way it is also incorrect in at least one detail.
The ability to request an exception to the DJI geofence has absolutely nothing to do with airspace class or FAA regulations - it relates to a somewhat arbitrary attempt by DJI to restrict inadvertent flights near larger airports or airspace restricted for National Security reasons.
And I'm still not clear what misinformation you are objecting to.