"Anyone Can Become Speaker"

     It's true.  The requirements to be elected Speaker of the U. S. House of Representatives don't include being a Congressthing.  In fact, they're pretty wide open: if you're not disqualified from holding an office or trust of the Federal government, you can become Speaker.  Arguably, you'd need to be at least 25 years old and to have been a U. S. citizen for seven years or more, but even that's a little shaky.

     The flip side is to look at the actual skill set the job requires.  It take more than mere ambition.  Kevin McCarthy wanted the job badly indeed -- and made many promises to get it.  He tried to give all of his party's Congresscritters what they wanted while keeping the country running and that proved his undoing: the GOP's House members had conflicting desires, and many of them wanted to shut the government down unless they got what they wanted.

     Successful Speakers have been master manipulators, skilled salespeople with a firm grasp of parliamentary procedure.  They were able to convince their fellow party members to swap votes for votes, to go along to get some of what they wanted, and kept the system working by working the system.  Many of them came off a bit smarmy, especially if they were from the party you didn't vote for, but they got the job done.  Within their own parties, they brought people together rather than driving them apart.*

     Yes, just about anyone can become Speaker of the House.  The list of people who ought to get the job, of people who can accomplish something with the job?  That's a whole lot shorter.
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* Across party lines, now that's a whole other thing in the House, and has been at least since the late 19th Century, when Speaker Thomas Brackett Reed Jr. harrumphed, "The best system is to have one party govern and the other party watch."  Best or not, that's how it has worked for all of our lives.