Yeah, all the calls for the 25th are from people who don't know how it works or why it was created. It's designed for situations where the President is in a coma, unconscious, or otherwise incapacitated. As a practical matter, the standard for "incapacitated" is "The President is unable to write a letter saying he can do the job of President". He doesn't have to actually be capable of doing the job of President, just capable of writing a letter saying that he can.
If he can't write the letter, his Cabinet can remove him with a straight majority vote.
If the President can write that letter, then he can contest this removal and the 25th Amendment will require a 2/3 majority in the House and Senate to remove the President. Regular impeachment only takes a straight majority in the House and a 2/3 majority in the Senate.
If you can't get the votes for Impeachment, be aware the bar for 25th Amendment removal is even harder.