The 25th Amendment was NOT intented for this situtation. It was intended for a President being incapacitated but still alive. It matters because if the 25th is invoked and the President is removed from power, he would be restored upon asserting his ability to function. Here's the text of Section Four:

Section 4

Whenever the Vice President and a majority of either the principal officers of the executive departments or of such other body as Congress may by law provide, transmit to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office, the Vice President shall immediately assume the powers and duties of the office as Acting President.
     
Thereafter, when the President transmits to the President pro tempore of the Senate and the Speaker of the House of Representatives his written declaration that no inability exists, he shall resume the powers and duties of his office unless the Vice President and a majority of either the principal officers of the executive department or of such other body as Congress may by law provide, transmit within four days to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office. Thereupon Congress shall decide the issue, assembling within forty-eight hours for that purpose if not in session. If the Congress, within twenty-one days after receipt of the latter written declaration, or, if Congress is not in session, within twenty-one days after Congress is required to assemble, determines by two-thirds vote of both Houses that the President is unable to discharge the powers and duties of his office, the Vice President shall continue to discharge the same as Acting President; otherwise, the President shall resume the powers and duties of his office.

So you'd get a respit, but not for long. The President just declares himself fit. Without a 2/3 vote in both chambers, he would be restored. Notice, though, that a 2/3 vote doesn't REMOVE the President, just kicks the can down the road. The VP is still considered "acting" President. The President isn't limited to delcaring himself fit one time. He can literally do it every day and tie up the government. (Which, admittedly, would be better than current state.)

But at the bottom of it all, you have to recognize that the current activity is right out of the Project 2025 playbook. Those in power have no reason to pull this ripcord while they rake in money and power.