If Congress was forbidden from delegating ANY authority, then federal laws could only be enforced by members of Congress. Bureaucrats would have no delegated authority to enforce Congressional laws...
Your misreading and misapplication of the Tenth Amendment would have members of Congress literally issuing federal pilots licences, rather than bureaucrats in the FAA issuing those licenses.
Your interpretation would deny mailmen the authority to verify that a postage stamp on any particular letter was valid. Instead, that letter would have to be physically examined by members of Congress.
That's simply not the case. Congress can delegate any of its power as it sees fit, so long as it has that power in the first place.
No offense intended, but you've never read the Constitution, have you? You're having a hard time understanding that The President can't delegate his war making powers to Congress or to the courts and the courts can't delegate their judiciary powers to Congress, and Congress cannot delegate legislative power to either of the other two branches. Somehow, I can't see that you even understand that there is a separation of powers in our system of government.
Read the document and cite me the pertinent Article and section which empowers any branch of the federal government to delegate its powers to another branch. Article I is the legislative article. Article II is the executive article, and Article III is the judiciary article. Remember, every power the federal government has is granted within the Articles and the amendments. Good hunting. I'll wait for you to do your research.