Well, Hoover was Coolidge’s Secretary of Commerce, and was in office for 9 months when the stock market crashed; Coolidge had set the policies that basically were in effect - including the budget - while Hoover was in office when it all fell apart. He certainly didn’t help it, but he didn’t set it up...
Additionally, Coolidge had a Republican majority for his entire term in both the Senate and House, something Ronald Reagan never had. During Coolidge’s term, the Democrats made steady gains in the Senate and House; he didn’t keep it together, unlike George Bush who saw actual gains, and Ronald Reagan who saw the Senate switch from Democrat to Republican majority.
Coolidge may have had good ideas, but he was a pretty weak political leader. You have to have actual leadership skills and charisma as well as sound ideas to be an effective political leader; apparently rabscuttle thinks just having a good idea is enough.