No, I am not forcing all n of any size to a constant, I'm saying that we can bottom out inductively for small n.

This is a very old discussion. Read Knuth's rationale. Then read the similar sections in Segwick et all or whatever other basic competence textbook on algorithms you like. Compare them, think about which contexts each approach is most useful in.

In other words, no, you have not somehow cleverly invalidated all of complexity analysis.

When log(n) is within the word size the hashmap lookup for the most part is actually constant i.e., few specific machine operation. A generic log(n) algorithm still requires log(n) distinct operation for the most part however small that number is.